Rainer Ultramatch & Rock Creek SPR Testing

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padom

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Rainer Ultramatch & Rock Creek SPR Testing
12/08/2016 Last edited 12/10/2016 by padom
(4 votes)

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Well I just love testing different AR barrels to see how they perform compared to others I've tested. As most know I am a huge White Oak fan. I have almost every flavor they sell, 10.5", 16", 18" SPR and 20" SDM all 1:7 .223 Wylde. They are all tack drivers!



Over the summer I set out to build a precision 300blk SBR/Pistol. I wanted it to be extremely accurate from 100yd and in for personal protection home/car gun. I have a few buddies that have multiple 300blks and all claimed they are fun guns but not precision guns. I set out to see if I could build a precision 300blk. I went through a few different barrels ranging from $225-$300 and the first few were OK and thats giving more credit than deserved. Thats after testing multiple bullets and powders. I sold each barrel at a loss and the last barrel I decided to try before giving up on the project was a Rainer Ultramatch 10.5" Shillen blank. The barrel is a straight tack driver with 125smk and 125tmk. After shooting 40rd to break in the barrel I did an OCW test with the 125tmk and H110 in 1xLC converted brass and CCI 450's. I settled on 18.6g. I loaded up 40rd and shot a 7x5 target and the agg across these 7 groups was .521"!! I never let the barrel cool, I just shot group after group. Thats from a 300blk SBR at 100yds with a bipod and rear bag. I was extremely pleased with this result so I decided just for fun I wanted to see how far out I can accurately take this setup. The magnetospeed had it at 2100fps so I input the data into Shooter and setup on a IDPA full size piece of steel at 500yds. I went 10 for 10 on the steel. My friends were amazed of the accuracy of this gun.

This is the reason Im itching to try Rainer's Ultramatch barrels to see how the stack up against my White Oaks! I just cant decide if I want to test the 18" Ultramatch SPR or their 20" SDM barrel. I most likely will test out the 20" since I have the most recent data and testing with my 20" WOA SDM to do a side by side comparison with loads. If the the Ultramatch performs great I will probably buy the next barrel down which is their Rock Creek version then the next level down Match version to see how they compare to the Ultramatch. Ordering the barrel today so testing will start in the next few weeks.

Stay tuned...

Build Parts I already have for this upper testing:

BCM Upper Receiver
Spikes NiB Milspec BCG
BCM CH
SLR Sentry 7 AGB
Seekins 15" Keymod Handguard
Vortex Razor HD 5-20x50 MIL/MIL
Vortex PMR 35mm Rings

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bigjake83XFirst Sergeant
Rating: 2.9/5 this site
1595 posts this site
Re: Rainer Ultramatch AR Barrel Testing
12/08/2016

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padom wrote:

Well I just love testing different AR barrels to see how they perform compared to others I've tested. As most know I am a huge White Oak fan. I have almost every flavor they sell, 10.5", 16", 18" SPR and 20" SDM all 1:7 .223 Wylde. They are all tack drivers!

Over the summer I set out to build a precision 300blk SBR/Pistol. I wanted it to be extremely accurate from 100yd and in for personal protection home/car gun. I have a few buddies that have multiple 300blks and all claimed they are fun guns but not precision guns. I set out to see if I could build a precision 300blk. I went through a few different barrels ranging from $225-$300 and the first few were OK and thats giving more credit than deserved. Thats after testing multiple bullets and powders. I sold each barrel at a loss and the last barrel I decided to try before giving up on the project was a Rainer Ultramatch 10.5" Shillen blank. The barrel is a straight tack driver with 125smk and 125tmk. After shooting 40rd to break in the barrel I did an OCW test with the 125tmk and H110 in 1xLC converted brass and CCI 450's. I settled on 18.6g. I loaded up 40rd and shot a 7x5 target and the agg across these 7 groups was .521"!! I never let the barrel cool, I just shot group after group. Thats from a 300blk SBR at 100yds with a bipod and rear bag. I was extremely pleased with this result so I decided just for fun I wanted to see how far out I can accurately take this setup. The magnetospeed had it at 2100fps so I input the data into Shooter and setup on a IDPA full size piece of steel at 500yds. I went 10 for 10 on the steel. My friends were amazed of the accuracy of this gun.

This is the reason Im itching to try Rainer's Ultramatch barrels to see how the stack up against my White Oaks! I just cant decide if I want to test the 18" Ultramatch SPR or their 20" SDM barrel. I most likely will test out the 20" since I have the most recent data and testing with my 20" WOA SDM to do a side by side comparison with loads. If the the Ultramatch performs great I will probably buy the next barrel down which is their Rock Creek version then the next level down Match version to see how they compare to the Ultramatch. Ordering the barrel today so testing will start in the next few weeks.

Stay tuned...

Build Parts I already have for this upper testing:

BCM Upper Receiver
Spikes NiB Milspec BCG
BCM CH
SLR Sentry 7 AGB
Seekins 15" Keymod Handguard
Vortex Razor HD 5-20x50 MIL/MIL
Vortex PMR 35mm Rings​

Very interested... I've always wanted to try a Ultra Match, but since they coast. the same as a Bartlein or Krieger I haven't tried them yet..

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padom

XFirst Sergeant
Rating: 3.8/5 this site
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Re: Rainer Ultramatch AR Barrel Testing
12/08/2016

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They are actually around $100 cheaper; depending on which you buy. I'm gonna try the 18" Ultramatch SPR Shillen blank under $400

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bigjake83XFirst Sergeant
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Re: Rainer Ultramatch AR Barrel Testing
12/08/2016

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Nice.. I'll be watching

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atomic41XSergeant
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Re: Rainer Ultramatch AR Barrel Testing
12/08/2016

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Cool, I'm thinking about ordering this exact barrel.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch AR Barrel Testing
12/08/2016 Last edited 12/08/2016 by padom

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Well order has been placed. I went with the 18" Ultramatch SPR. Really happy I ordered it tonight, because upon checkout it applied a $76.85 discount to my order so after expedited shipping total was only $318 instead of just over $400!!! No idea what the discount is. Im going to add the Rock Creek barrel to my cart and try and check out again, if it applies the same crazy discount I will order and test that one also!!



EDIT: Yep, for some reason after adding any of the barrels to your cart a 20% discount is automatically applied!! Time to grab a few to do some testing over the winter months!

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Terryw123X72 MONTHS
Premium Member
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Re: Rainer Ultramatch AR Barrel Testing
12/08/2016

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Very cool! I have been wanting to build a AR-15 on a Rainer barrel! I ordered a gen II pst for this exact reason!
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arLPGXCorporal
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Re: Rainer Ultramatch AR Barrel Testing
12/09/2016

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Thanks for the heads up, padom ! I've been eyeballing a Rainier Ultramatch in 308 to try. The discount saved me $80. Glad to see your results. Hope I get the same.
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Steelhead43XGunny Sergeant
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Re: Rainer Ultramatch AR Barrel Testing
12/09/2016 Last edited 12/09/2016 by Steelhead43

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I have a SPR 18 ultra match.
At first it was ok.
Then it got Real good.
Very happy with it.
It LOVES 69 & 77 smk's
I can still often get moa 5shot groups even with a 1x4 scope on that rifle.

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lte82XFirst Sergeant
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Re: Rainer Ultramatch AR Barrel Testing
12/09/2016 Last edited 12/09/2016 by lte82
(1 vote)

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Our team shot Shilen blanks at Camp Perry this year. We came away with multiple national titles, including three individual national records and a team national record. They shoot.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch AR Barrel Testing
12/10/2016 Last edited 12/10/2016 by padom

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Well got a call from Rainer last night informing me that the 18" Ultramatch SPR I ordered is out of stock even thought it said 2 In Stock when I ordered!!! GGrrrr

They put my order on backorder till I tell them what I want to do. They have no timeframe when the SPR will be back in stock. I may just have them change it to the 20" Ultramatch Shillen blank so we can get this testing going.

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padom

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Re: Rainer Ultramatch AR Barrel Testing
12/10/2016 Last edited 12/10/2016 by padom

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Well I got a shipping notification without even speaking with them about the out of stock 18" barrel. Shipping email says 18" Ultramatch SPR so maybe they found one.... IDK. Will be here next week!

Also got the 18" Rainer Rock Creek SPR barrel to test. It was hard to turn down with the sale going on. At just over $200 if it hammers it might be the best value out there.

 

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TexasEricXPrivate
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Re: Rainer Ultramatch AR Barrel Testing
12/10/2016

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Padom, pics of the rifle please.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/10/2016 Last edited 12/10/2016 by padom

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Well the barrels have to arrive first and then uppers built in order for pics to be taken....

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Jibnast

XSergeant
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Re: Rainer Ultramatch AR Barrel Testing
12/10/2016

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padom wrote:

Also got the 18" Rainer Rock Creek SPR barrel to test. It was hard to turn down with the sale going on. At just over $200 if it hammers it might be the best value out there.​

I think you will be really happy with the Rock Creek. I prefer them more and feel it cleans up better. With that said you cannot go wrong with either.

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/10/2016

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I'm really interested in how it compares to my WOA at almost double the cost.

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nilescoyote

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016

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Watching with interest. AR-Comp & 77smk's worked well in my 223 wylde 18" SPR rock barrel. Nice mild powder for the 223, it did require me to open my gas block up a couple clicks. I was using either imr8208 or H4895 prior to that.

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016

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Whats your AR-Comp/77smk load?? Loading some up this morning to test today in my 20" WOA SDM so I have some data to compare the Rainer barrels to.

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nilescoyote

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016

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padom wrote:
Whats your AR-Comp/77smk load?? Loading some up this morning to test today in my 20" WOA SDM so I have some data to compare the Rainer barrels to.​

I'll double check when I get home tonight but IIRC 23.8 grains...

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016 Last edited 12/11/2016 by padom

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Wow thats a lot of AR Comp!! Most loads Im finding are saying 22.4-22.6 is their load. Let me know



Edit:

Just found your post in the Reloading Depot. You posted 22g-22.8g which is in line with what others are using with AR Comp.

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nilescoyote

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016

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Could be, It was above book for sure, but I was going slow and watching for pressure signs.

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nilescoyote

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016

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Just found that post in the depot, I am positive the load was 23.8 now, If you can see the target pic it shows it (not a very good group at the time) and velocity was 2774 sd-7 es-18. I was using LC brass and over the course of 5-6 trips to the range shooting the same load on the same pieces of brass I can say that load was safe in my barrel. Also of note when searching my email with my shooting partner it is a very high case volume. I use a drop to to load everything and I noted to him that the case was full but not getting any spring back on the bullet to change OAL...

IIRC there was another node a little south of that around 23 grains that was also good.

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016

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Ok I will test and see what pressures look like. I just loaded up 22.2 - 23.4 in .3g increments. If no pressure signs and good results I will go higher.

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lte82XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016 Last edited 12/11/2016 by lte82

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22.4 AR Comp / LC brass / 77 gets me 2730 fps in two different 20" Shilen barrels / wylde chambers. 23.0 puts me over 2800 and heavy ejector marks. I do run 23.0 with the 80 smk / 80.5 berger in my of my match rifle, but loaded out almost .150" past mag length, and they have a lot less bearing surface so they build less pressure anyway. I would definitely look carefully at the brass as you go up.

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DavidDSAR10X253 MONTHS
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/11/2016

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In like Flynn.



Want to build a sub-SSonic 300BO that is laser accurate to 100yds

AND

Hollywood quiet.

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12/14/2016

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Ultramatch is arriving tomorrow, Rock Creek Monday. Nosler RDF's arrived today and 3 more boxes of 73 ELD-M. Gonna load up some OCW to test after break in. Have 77smk loaded, will put 35 down range before any testing.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/15/2016 Last edited 12/15/2016 by padom

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I received my UltraMatch today. They did in fact swap out the 18" UltraMatch Shillen for the 20" UltraMatch Shillen since the 18" was out of stock with no return date in sight. I also receiver the Aero Precision 15" Keymod forend I got on Christmas sale for $89.99. I bought it to test. It seems solid, for $89 I think its a great deal. Also got a melonite rifle length gas tube and SLR Sentry 7 AGB. Have some Young and Spikes BCG's in the safe so I decided to use the Young BCG.

The BCM M4 upper has a slightly undersized barrel extension requiring you to heat it up with a heat gun to slip the barrel in for a nice tight fit per BCM instructions. After applying a little heat and a light film of Valvoline Synthetic grease to the barrel extension the barrel slipped in nicely. I then installed the BAR barrel nut with some anti-seize on the threads and torqued it down till the gas tube hole lined up (55 ft lbs).



Going to load up 40rds of Nosler 77c / 23.6g 8208XBR to break in the barrel a bit then will shoot my go to 77smk load to test for accuracy and report back. After that I will start load development testing with 77smk, 75BTHP, 73 ELDM, 70RDF.

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bigjake83XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/16/2016

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Nice build....And a very creative way to utilize old furniture.

 

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/16/2016

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Haha. I moved recently and don't have my third bench built yet for gun building, repairs so I use that old table. It does the job for now. lol

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/19/2016

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Ok I have OCW's loaded up with 8208XBR for 77cc, 77smk, 75BTHP, 73ELDM, 70RDF. Going to shoot all these OCW tomorrow or Wednesday out of the 20" Ultramatch upper. 18" Rock Creek SPR arrives tomorrow.

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supercorndogs

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/19/2016

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bigjake83 wrote:
Nice build....And a very creative way to utilize old furniture.​

I had to go back and look at the pictures. I thought it was a bench until you said something.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/20/2016 Last edited 12/20/2016 by padom

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I made it out today to shoot the OCW's I had loaded up. It was 31F and calm conditions. Everything was shot over the Magnetospeed V3 at 100yds from the bench, bipod and rear bag. Scope is a Razor HD Gen 1 5-20x50 Mil/Mil I borrowed off my 6.5cm semi for testing. Lower is a AeroPrecision Gen2 lower, Magpul PRS Stock, Rifle buffer and spring, Geissele SD-E trigger, ERGO Tactical Deluxe Grip.



All the test loads below were loaded just under magazine length. 2.261 - 2.265 COAL depending on the bullet. I am using metal BCM mags which allow a max COAL just over 2.27". Seating depth measured base to ogive is marked on each OCW target.

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/20/2016

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Nosler 70g RDF - 8208 XBR - 3xLC - Federal 205 - 1.8030" Base to Ogive

The barrel just didnt like this bullet/powder combo. Will try again later with different powder

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/20/2016

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Hornady 73 ELD-M - 8208 XBR - 3xLC - Federal 205 - 1.8210" Base to Ogive



I am very happy the UltraMatch liked this combo. The 73 ELD-M did not shoot well in my 20" WOA SDM barrel after testing multiple powders and seating depths. At $7/100 cheaper than 77smk and higher BC this is my new favorite combo! Looks like a node between 23.2-23.6. Going to load up a seating depth test at 23.4g and see if the group shrinks anymore. The velocity and SD numbers are exactly what I was looking for!

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/20/2016

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Hornady 75 BTHP - 8208 XBR - 3xLC - Federal 205 - 1.8460" Base to Ogive



Pretty good results. I have a ton of these bullets, they shot OK, but not nearly as well as the 77smk in my WOA's. They are definitely shooting better out of this Rainier. Looks like a node between 23.1-23.5. Might also be another node starting at 23.9g. I dont have any ejector swipe on the cases at 23.9 but primers are just starting to slightly flatten. I might load up 23.8-24.2g in .1g increments and retest.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/20/2016

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Nosler 77cc- 8208 XBR - 3xLC - Federal 205 - 1.8715" Base to Ogive



So I bought a few thousand of these a LONG time ago to shoot during 2 gun matches out of my 16" WOA at the recommendation of a fellow 2gun shooter. I just couldnt get these to shoot anywhere near as accurate as my 77smk load so they have been sitting on the shelf collecting dust. Every new match barrel I test I always try these in it and none like it. I tested my 10.5", 16", 18" and 20" WOA's but the WOA just dont like this bullet. I am very happy to see this UltraMatch loves this combo. Node between 23.1-23.6. Excellent accuracy and SD's but velocity is lower than desired.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/20/2016

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Sierra 77 Matchking w/c - 8208 XBR - 3xLC - Federal 205 - 1.8715" Base to Ogive



Looks like a node between 23.1 and 23.6. Velocity is pretty good, not as good as my 20" WOA but this barrel might speed up after a few hundred rounds. Looks like Im going to have to play with seating depth to see if my groups shrink up to match the accuracy of my 20" WOA SDM. Going to load up a seating depth test at 23.3g and see how that does.

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/20/2016

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Overall I am very happy with the 20" Rainier UltraMatch Shillen barrel. I got it for $100 cheaper than my 20" WOA SDM with the 20% off sale last week which I would say is a steal after seeing how it shoots. Even at full price this barrel is well worth it.

I initially put 55rd through it to break it in last week then gave it a good cleaning before doing OCW testing. I put 35rd down the clean barrel today to foul it before starting testing. After the initial break in and OCW testing today I have 193rd through it. I will continue posting my results here as I test this barrel further. After doing some additional seating depth testing I will then take my final loads to 500yd for testing.

18" Rainier Rock Creek SPR arrived today. I also have another SLR Sentry 7 AGB and gas tube arrive. Waiting on another BCM upper which will be here end of week. That will be the next round of tests.

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/22/2016 Last edited 12/22/2016 by padom

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Got back out to dont some additional testing with this UltraMatch upper. Loaded up a seating depth test for the 73 ELD-M with 23.4g and did another OCW with the 75BTHP in .1g increments from 23.8-24.2 to see if that was another node forming. It sure is, POI is the same for each of those groups. I will probably skip doing a seating depth test with that high node because Im seeing swipes on the case heads.

I am very happy this barrel loves the new 73 ELD-M. Seating depth test shrunk those groups right up. They definitely like to be closer to the lands. Those measurements on the target are ogive measurements but COAL for those 2 tight groups are in the 2.267-2.271 range. The feed no problem from my metal BCM mags. I am going to load up 50rd and test them at distance. This load is very accurate at 100yd with single digit SD and velocity in the 2775 range.



75BTHP 8208XBR OCW #2 (High Node)

73 ELD-M 23.4g 8208XBR Seating Depth Test

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/25/2016 Last edited 12/25/2016 by padom

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The BCM/18" Rainier Rock Creek SPR 1:8 upper is assembled and ready for testing. I hope to test it out this week to see if it shoots like the 20" Ultramatch.


18" Rainier Rock Creek 1:8 .223 Wylde
BCM MOD4 Upper Receiver
Seekins 15" Keymod Hanguard
SLR Sentry 7 Clamp AGB
Rifle Length Gas Tube
Spikes Tactical Milspec NiB BCG
BCM Charging Handle
Rugged Suppressors Flash Hider Mount

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atomic41XSergeant
Rating: 3.2/5 this site
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/27/2016

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Thanks for sharing. I ordered the 20" ultramatch, it should be here Thursday. I'm excited to shoot it.

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padom

XFirst Sergeant
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3043 posts this site
Re: Rainer Ultramatch & Rock Creek SPR Testing
12/27/2016

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No problem. As you can mine loves the new 73ELD-M and 77cc. Didnt do any seating depth testing with the 75BTHP or 77smk to see if those groups shrink up. Bit delayed with my son having an ear infection. Its 65F outside today but no shooting for me....

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/29/2016

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Got this 20" Shillen Ultramatch back out today to get final chrono numbers and confirm accuracy with my new 73 ELD-M load. Velocity over the v3 was 2800 SD7.5. Then removed the v3 and shot two groups of 5 shots each to confirm accuracy. Im loving this barrel. Just have to fix my zero. Got windage adjusted perfectly on the second group but have to bring it up a little before testing at distance.

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DoubleStackXSergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/29/2016

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Great thread. I'm looking forward to your Rock 18 barrel. I have a 20 rock also from rainier arms but have not gotten many rounds through it yet. So far it shoots good with factory match and as long as I'm not screwing it up.

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1slow01z71XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/31/2016

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Interested to see your further testing. XBR has become a favorite of mine lately.
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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/01/2017

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Hope to get out this week. The flu hung me up for the past few days. XBR is my favorite 5.56 powder. Its accurate, fast, temp stable and meters better than Varget or H4895.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/12/2017

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Between the holidays, getting sick then slammed once back to work I haven't got out to test the Rock barrel. Will try to get out tomorrow otherwise it will be next week. Stay tuned..

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DantromXGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/12/2017

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I bought a rainier rock barrel from aim surplus when they had them.
It's a 16" rifle gas length 1:8 wylde
I'm running the 77gr tmk 556 from black hills right now and it has been shooting great from me. I haven't truely test accuracy potential as far as my skill set goes. As in I have a 2.5-7 weaver mounted and to really test it for groups with my abilities I need to mount a higher mag scope.
But I consistently get one inch 5 shot groups usually better with this combination.

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padom

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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/17/2017 Last edited 01/17/2017 by padom

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Ok got my testing scope switched over and the upper mounted on the lower. 18" Rainier Rock Creek SPR is ready for testing. Loading up 50rd 77cc/23.6 8208XBR to break in the upper than will start load development to see what it likes best.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/17/2017

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I got out this afternoon in the light rain to put 35rd of 77cc/8208 through it just to function test it and break it in. All is good. The last 10-15rd really started to group nicely which is promising. Now on to load development for this barrel. I loaded up 75BTHP and 73ELDM OCW's with 8208XBR tonight. Will shoot them tomorrow.

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powdahound80XGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/17/2017

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Padom
Following this and now I want to build a precision AR this year.
Curious, how far to you jump your bullets for your OCW before you settle on a node and start tweaking seating depth. Also, do you tend to go more towards jump or jam once you leave your "standard" or do both to see what works best?
thanks for the awesome stuff in this thread, very interesting and helpful.
Elija

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/17/2017 Last edited 01/17/2017 by padom

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I typically load all my OCW tests to roughly 2.26". Once I find my OCW i then do a seating depth going both closer and farther from the lands in .003 increments. My metal mags allow a max COAL of roughly 2.271" so I only go as close to the lands that will still feed in my mag.

As shown in my above 73 ELDM seating depth test, when you find the seating depth your barrel likes groups shrink right up. It all depends on the barrel though. My WOA liked to be seated in the 2.248" COAL range with 77smk. These 73 ELDM like to be closer to the lands so loaded longer.

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powdahound80XGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/17/2017

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Thanks for the reply. Good info. Seems like your system works quite well.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017 Last edited 01/18/2017 by padom

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After putting 35rd through the barrel yesterday I ran a wet patch through it then dry patched it out. I then put another 35rd of 77cc through it today to foul the barrel and get it ready for load development. I let the barrel cool and started my OCW tests with 70rd down the barrel.



The 73 ELD-M's didn't perform like they did in the 20" Ultramatch. The SD's are high compared to all my go to precision AR loads which are all in the single digits. Primers just starting to get slightly flat and ejector marks at 24.0g and heavier at 24.2g.



73 ELD-M ~ 8208 XBR ~ 3xLC ~ 205 ~ 1.825" Ogive

The 75 BTHP performed really well. Good velocity numbers and nice low SD's for pretty much all the charge weights. Loads from 23.2 - 24.0 all wanted to group showing me a seating depth test should shrink things right up. Primers look great for all the charge weights with a faint ejector mark on 24.0g and slightly heavier for 24.2g. Im going to load up 23.5g and do a seating depth test to see how the groups shrink up. These were loaded longer than Ive ever tested in any AR barrel. They liked to be farther away from the lands in my other barrels so I suspect thats where Ill find the smallest groups.

75 BTHP ~ 8208 XBR ~ 3xLC ~ 205 ~ 1.858" Ogive

Will load the seating depth test up tonight and test tomorrow and report back. I probably wont test anymore bullets if the 75BTHP groups shrink right up. I bought these barrels and wanted to do this testing to see if they would shoot the cheaper, higher BC Hornady bullets compared to 77smk, 77TMK, 69TMK, 69SMK and 70 RDF. My WOA's LOVE 77smk but did not favor the cheaper, higher BC Hornady bullets. Im glad the 20" Ultramatch loves the 73 ELDM and that will be my go to load for that barrel. If I can get nice tiny groups and single digit SD's from this 18" Rainier Rock Creek SPR barrel with 75BTHP then I will call the purchases and testing a success.



73ELD-M $20.80\100 vs 77smk $28.25\100

75BTHP $95.83\600 vs 77smk $120.78\500





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DantromXGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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Padom,
Do you keep your brass separate for each of your separate ar barrels for reloading?

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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I have not for some time now. I did but after shooting 1xLC annealed in my 16" WOA, 18" WOA, 20" WOA I found fired case headspace to be the same. I just bump it all .003 with a Forster FL sizing die, trim to length and it all goes into a bin ready for loading. All testing has been done with 3xLC annealed brass

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DantromXGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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Cool, thanks I'm getting ready to start reloading and run a few different ar's and was wondering if I'd be behind having a bucket full of all sent brass from varying rifles.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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Only you will know the answer to that. You need to take the same brass headstamp, LC for example that has been fired in each rifle your going to reload for and measure the fired case headspace with the Hornady Case comparator and your calipers. I usually will measure 3 pcs per rifle and write down the avg. Now compare the number you got for each rifle..Are they the same or within a .001-.002?? If so you now setup your FL sizing die to bump your cases back .003 from the smallest number you got and that brass will now fire in all your rifles.

If you find the brass headspace measurement for one of your guns is drastically different then I would keep brass fired in that gun separate.

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DantromXGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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Thank you, I will check that out. I understand what your doing I'll have to see because two of thw rifle have wylde chambers one is a 556 and the other is a CLE chamber from compass lake.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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just check them is all. if they are close your fine just use the shortest case and bump from theur.

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[Guest]

DogsniperXFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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Padom. What was the velocity in the 18" barrel? Thanks

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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Dogsniper wrote:

Padom. What was the velocity in the 18" barrel? Thanks​

If you look at my tests you will see velocity and SD for every charge weight is written on the targets...

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/18/2017

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Velocity difference for the 75BTHP and same charge weights looks to be about 35fps from the 20" Ultramatch to 18" Rock Creek SPR.

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DogsniperXFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/19/2017

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padom wrote:

Velocity difference for the 75BTHP and same charge weights looks to be about 35fps from the 20" Ultramatch to 18" Rock Creek SPR.​

Thanks. I have an 18" noveske I was wanting to try the eld in?

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/19/2017

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Dogsniper wrote:

padom wrote:

Velocity difference for the 75BTHP and same charge weights looks to be about 35fps from the 20" Ultramatch to 18" Rock Creek SPR.​

Thanks. I have an 18" noveske I was wanting to try the eld in?​

The 73 ELD-M looks to be about the same at 35fps difference from 18" - 20". We will see if this barrel speeds up at all. Only 116rd down it so far.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/19/2017 Last edited 01/19/2017 by padom

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Was able to get to the range and do the 75BTHP seating depth test with 23.6g 8208XBR and I also decided to load up a Nosler 77cc OCW test since I have so many of them. My WOA's hate them, the Rainier Ultramatch shot them pretty darn well so I figured I should give them a go in this Rock Creek barrel.



Seating Depth Test: 75BTHP ~ 23.6g 8208XBR ~ 205 ~ 3xLC

All in all the best group with this seating depth test is right at 0.50". Pretty darn good for a barrel I paid $207 for during the Rainier December 20% off sale. Im really happy how this barrel performs, more so when you look at what it cost compared to the other top shooters out there. I would say you do gain slightly tighter groups with the Ultramatch (Shilen) barrel but not much. You have to decide if the additional $100 is worth it or not. I am going to load up another seating depth test between 1.860 - 1.870 in .002 increments just to make sure I didnt skip over a slightly tighter grouping jumping in 0.0055" increments.





77cc ~ 8208XBR ~ 205 ~ 3xLC ~ 1.8760" Ogive

The Nosler's again shot pretty darn well, just like in the Ultramatch. Way better than they shoot in my WOA's. Primers are nice and round, no pressure signs what so ever until 24.2g which has a very slight ejector mark. I may do a seating depth test with these but they look pretty darn good for a cheap bullet out of a relatively low priced barrel. While 23.6 is damn tight the center of the node looks to be around 23.8-24g with single digit SD. I may load a seating depth test up and see if I can get 23.9g to shrink below 0.5moa. I have a ton of these bullets and they have shot the best out of this barrel compared to about 5 other barrels tested over the past 2 years. Might actually be able to use them up.

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[Guest]

atomic41XSergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/21/2017

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I got my 20" Ultramatch barrel out today. Shooting Federal 69gr SMK, I pulled off a few 1/2" groups. I'm pretty happy with how this is starting out.

I don't reload so I'll be testing different factory ammo. I put this rifle together to run some PRS gas gun and local matches with. So far I'm digging this rifle and loving my barrel choice!

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/21/2017

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Check out the IMI 77gr OTM RazorCore. On sale at SGAMMO.com. Very accurate

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atomic41XSergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/22/2017 Last edited 01/22/2017 by atomic41

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padom wrote:
Check out the IMI 77gr OTM RazorCore. On sale at SGAMMO.com. Very accurate​

Thank you, I will order some and that's a great price for quality ammo. I posted too soon above. I said 1/2" because I eyeballed them before actual measuring. I just pulled the targets out and actually measured, there were three groups that came in at 3/8". So I'm even happier now with this first outing using factory match ammo. Sorry Padom if that makes your head spin, you're so good at documenting everything.

I didn't give this the proper attention on this outing. I'm going to get more serious with it now.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/22/2017

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Ultramatch is a awesome barrel. Glad I grabbed them at 20% off which makes them even more of an awesome deal! I shot 0.5moa groups at 500yd with the RazorCore out of my 16" WOA. Friend gave me a box to test one day at the range.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/27/2017 Last edited 01/27/2017 by padom

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I was able to get out and test the Rock Creek SPR a little more this week and the 75 BTHP's were very accurate along with the 77cc. This is a very nice barrel for the price. I will be posting the 18" Rainier Rock Creek barrel in the FS section since I cant keep them all. I have way too many AR15 barrels and uppers on the bench and need to thin the heard so I can grab some more stuff to test/review. Trying to acquire the 18" Rainier Ultramatch SPR for testing which is the barrel I originally said I was going to test but they were out of stock after I placed my order. I will also be testing the Rubber City QPQ AR15 BCG in a new upper if I can get an 18" Ultramatch. While we hear a lot about Rubber City BCG's, I dont see really any reviewed here. I ordered a couple and will test them out and post my results here.



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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
01/27/2017 Last edited 01/27/2017 by padom

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Just heard back from Rainier, the 18" Ultramatch SPR is on the way so that will be the next barrel I test. Thank you Rainier!



The 18" Rock Creek SPR barrel with 129rd on it is now in the FS section to recoup some funds. Great barrel for the money! Especially for those looking for a very accurate barrel and dont want to spend $400 on a barrel.

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mpk1996XGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Sunday at 2:38 AM

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did you ever get any of the 70g RDFs to shoot? ever play with the compass lake barrel?

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Sunday at 11:09 AM

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No, the 70 RDF's in my testing were not anywhere near as accurate as the other bullets tested at max mag length therefore my testing is done with them in the AR. Maybe give them another try in the future in a bolt gun.

Yes, Ive had both Bartlein and Kreiger Compass Lake barrels. The point of my testing is to see how less expensive options stack up accuracy wise to those barrels. WOA and the Rainier Ultramatch barrels hold their own in my testing.

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SHMikeinFlX107 MONTHS
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Sunday at 6:10 PM

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I picked up 300 of the 70 RDF. They're 2.380 to the lands in my 16 WOA. 2.4 to the lands in a 700 w/ a Douglas barrel. I can't see a use for them other than a bolt gun or slow fire 600 ammo for high power.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Sunday at 6:54 PM

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Totally agree. Epic fail. I have 200 or so left and they will sit for a long time or be used to foul a barrel. 73 ELD's on the other hand have really amazed me. Very accurate and cheap.

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lennyo3034XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Sunday at 7:36 PM

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Same here, can't get RDFs to shoot at any mag length.

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BryanWMXGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Sunday at 8:27 PM

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Padom you have been tons of help with my ar build.
Do you see any advantage in a compass lake kreiger over the ultra match?
Volocity, accuracy? ?
I know it's too soon to ask barrel life

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Sunday at 9:23 PM Last edited Sunday at 9:25 PM by padom

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I mean my test sample is so small but from the 2 Ultramatch's (shilen blanks) Ive tested they have ALL shot lights out. I have my 3rd Ultramatch, 18" SPR arriving in a day or two but I dont expect it to shoot any different than my other Ultramatches. The Bartlein/Kreiger Compass Lake barrels shoot, but those blanks start off more expensive than most which keeps their price high. I wouldnt say my CL barrels shot any better or worse than my Ultramatchs or WOA's.

Im a huge Bartlein fan and have many of them. They are awesome barrels. You have to make the choice. Shilen says the ratchet rifling on the Ultramatch blanks make for a easier to clean, longer lasting barrel. Time will tell.

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powdahound80XGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Sunday at 9:50 PM

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This is great info for people researching accurate AR builds. Hats off to you for all of this.
Too bad you have to screw around with rifles and do a lot of shooting to do it.......
I am set on starting one this year, just have a couple other projects to finish first

 

[Guest]

jackinflXGunny Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Yesterday at 4:24 PM

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Padom,
Do you have any data w factory match ammunition?
Thank you

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Yesterday at 4:47 PM Last edited Yesterday at 4:48 PM by padom

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jackinfl wrote:
Padom,
Do you have any data w factory match ammunition?
Thank you​

Unfortunately not. I reload so no factory ammo testing for me unless anyone wants to send me factory match ammo to test. I would be more than glad to do the testing.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Yesterday at 4:49 PM Last edited Yesterday at 4:56 PM by padom

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The 18" Rainier UltraMatch SPR barrel arrived today along with two Rubbery City Armory 5.56 Standard Mass M16 BCG's with Black Nitride+ Enhanced coating. Thing is real slick. Going to assemble the upper today, will post pics once its all together. Looking forward to testing it out.



18" Rainier UltraMatch SPR Barrel

• Stainless Steel Match Grade Shilen Blank
• Length: 18" SPR
• Twist: 1:8
• Thread Pitch: 1/2 X 28
• .750 Gas Block Seat
• .223 Wylde Chamber
• Rifle Gas System
• Ratchet Rifling
• M4 Feed Ramps
• SPR Contour
• Bead Blasted Finish
• Weight: 2 lbs 9 oz

Rubbery City Armory 5.56 Standard Mass M16 BCG

• Blacknitride+ Enhanced
• Radius Machined Bolt, RCA Firing Pin, Cam Pin, Retaining Pin
• Carrier Material 8620
• Bolt Material 9310
• Tool Steel Extractor and Cam Pin

*LIFETIME WARRANTY*

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RA223MM

X8 MONTHS
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Yesterday at 7:14 PM

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I have a RA Ultramatch on my current SPR build. Shoots .5-.75 moa. usually closer to .75. But a fair amount at .5. I'm not the best shooter, but not a slouch either. Have about 2100 rounds down mine and it still shoots very nice.

I have a RCA low mass carrier that I have for my new CLE Krieger build I will be running with a TBAC223 Ultra. Bolt was matched to the barrel. Curious to hear your feedback on that carrier. Can't wait to get the rifle put together once my can gets out of jail. Hopefully it will be here once I have 3000-3200 down the Ultramatch.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Yesterday at 7:19 PM

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What are you shooting that gets .75moa?? Factory ammo? Handloads?? What load?

My 20" Ultramatch shoots 0.5 all day as shown above with 73 ELDM load.

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RA223MM

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Re: Rainer Ultramatch & Rock Creek SPR Testing
Yesterday at 7:24 PM Last edited Yesterday at 7:26 PM by RA223MM

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Edit for charge weights

Hand Loads.

77SMK VVN540 24.4 BR4 LC Brass
69SMK Varget 25.7 BR4 LC Brass

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Yesterday at 7:28 PM Last edited Yesterday at 7:28 PM by padom

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I didnt have the greatest luck with those 2 bullets in my 20" Ultramatch testing, while my WOA barrels love both of them.

The Ultramatch in my tested loved the 73ELDM, 77cc and 75 BTHP best, in that order.

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RA223MM

X8 MONTHS
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Re: Rainer Ultramatch & Rock Creek SPR Testing
Yesterday at 7:29 PM

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I am going to pick up a box of the 73ELD just to try out, since you had such great results.

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[Saf3sh00t3r]

Thanks for moving this here padom!

 

[clarkarchery]

Really been looking at the ultra match for a new barrel on my 300 blk. Now I guess it's time. Thanks for the info

 

[Guest]

Really been looking at the ultra match for a new barrel on my 300 blk. Now I guess it's time. Thanks for the info

You can't beat the 300Blk 10.5" Ultramatch. I mean my target above shows that. It just straight hammers.

 

[Guest]

So I did get out last week for a quick session to function test the newly built 18" Rainier UltraMatch SPR upper with the Rubber City Armory BCG. Functioned flawlessly. Gotta get out and get some load development testing done on it but it really like the 75 BTHP and 73 ELD-M best which is exactly how the 20" Ultramatch performed.

 

[PorkChop]

Tag

 

[malinkyhoy]

12/14/2016

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Ultramatch is arriving tomorrow, Rock Creek Monday. Nosler RDF's arrived today and 3 more boxes of 73 ELD-M. Gonna load up some OCW to test after break in. Have 77smk loaded, will put 35 down range before any testing.

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padom

XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/15/2016 Last edited 12/15/2016 by padom

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I received my UltraMatch today. They did in fact swap out the 18" UltraMatch Shillen for the 20" UltraMatch Shillen since the 18" was out of stock with no return date in sight. I also receiver the Aero Precision 15" Keymod forend I got on Christmas sale for $89.99. I bought it to test. It seems solid, for $89 I think its a great deal. Also got a melonite rifle length gas tube and SLR Sentry 7 AGB. Have some Young and Spikes BCG's in the safe so I decided to use the Young BCG.

The BCM M4 upper has a slightly undersized barrel extension requiring you to heat it up with a heat gun to slip the barrel in for a nice tight fit per BCM instructions. After applying a little heat and a light film of Valvoline Synthetic grease to the barrel extension the barrel slipped in nicely. I then installed the BAR barrel nut with some anti-seize on the threads and torqued it down till the gas tube hole lined up (55 ft lbs).



Going to load up 40rds of Nosler 77c / 23.6g 8208XBR to break in the barrel a bit then will shoot my go to 77smk load to test for accuracy and report back. After that I will start load development testing with 77smk, 75BTHP, 73 ELDM, 70RDF.

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bigjake83XFirst Sergeant
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Re: Rainer Ultramatch & Rock Creek SPR Testing
12/16/2016

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Nice build....And a very creative way to utilize old furniture.

I have ave the same build with an 18” Rainier 18” wylde barrel.

 

[1slow01z71]

Glad to see I'm not he only one who can't get RDFs to shoot. Damn things jump a mile at mag length.

 

[TonyTheTiger]

rainier rock creek 18'' SPR

https://ibb.co/heFCx6

just finished my build and have less than 100 rds through it so far. not much info out there on this one. took it out and test fired about 20 rounds. got scope mounted a few days later and took it out to zero. first 3 shots including first cold bore shot

https://image.ibb.co/jFvUc6/IMG_0363.jpg

moved to 200 after 100yd zero.

first 5 shots at 200yds

https://image.ibb.co/i4UcVR/IMG_0362.jpg

Damn. Lets hear about the ammo.

 

[padom]

Home defense situation?? I don't know anyone that would choose a 69smk bullet for home defense...

 

[padom]

anything constructive to add? i didn't say it was a good choice for home defense. maybe somebody does use it for home defense. are you 100% sure noboby uses it?i don't think it really matters what you use from close range at almost 3000 fps as long as its reliable.

I think I've added tons of constructive information to this testing/review thread I started.. it actually does matter what you use but you go ahead and sling 3000fps 5.56 rounds in your house. I know I won't be.

do us a favor post up a 5x5 or 6x5 instead of a cherry picked group so we can see a real assessment of that barrel.

 

[padom]

what are you? some internet tough guy? i showed my groups from this barrel. not sure what ''cherry picked groups'' are? these were my first groups out of this barrel after mounting my scope. i didnt pick the best groups and post them . it was consistent. you want to bash a guy because he got better groups than you with factory ammo?maybe you're just not good at shooting or you got a bad barrel. if you really doubt these groups,come see me sometime,i'll repeat them. bring your checkbook. also,don't assume things,your bad at it. i don't use a rifle for home defense. never said i did. i'm sure some really good guys stay away from this site because of clowns like yourself.

Better groups than me? Don't know how to shoot? Lolololol.

watch yourself tough guy. We don't judge barrels around here by single groups.. 5x6 are how we determine a barrels accuracy. Stick around a little while, maybe you'll learn something.

 

[bobke]

Snake
When you’ve been around this site longer than 11 posts, and have read around a bit, you’ll quickly find more than ample evidence of Padom’s contributions to loading in general, semi autos more specifically, and even to those not yet smart enough to know what they don’t know. To borrow from a song, “it’s a long road to wisdom, and a short one to being ignored”. My money’s on Padom, every time.

 

[Triple D]

Tried the 73gr load in 2 Rainier Ultramatch barrels, with both producing sub half moa results! Thanks for the leg Work Padom!