300 PRC update

Rocketmandb

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Please post a review when you're done! If Lapua or Peterson don't get up to speed by SS 2020 that's in the cards.
Will do. I'll probably be putting it together this weekend after I shoot on Saturday. It needs spent primers to plug the primer pockets and I don't have any!
 

ErikJS

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I am having a rifle built in .300 PRC, maybe the first in The Netherlands. 28” Lothar Walther barrel, Ultimatum Deadline action, Bix'n Andy trigger, chassis to be decided. Very excited!

However, I am a bit in doubt as to what twist rate I should use. I see that the Bergara, Christensen and MRAD rifles are in 1:8, the Ruger RPR .300 PRC uses 1:9. Most people here are talking 1:9.

What should I use, assuming I will first shoot the 225 ELD-M ammunition and later handload, probably with the 225gr ELD-M, but perhaps also with the 230gr A-Tip and maybe even the 250gr A-Tip.

Hornady recommends 1:9 for the 230gr A-Tip and 1:8 for the 250gr A-Tip. Dilemma! What’s the best compromise now? I think for the 225gr ELD-M and the 230gr A-Tip I should go with 1:9. Will I then be unable to use the 250gr A-Tip?

Your advice and insights are most welcome!
 

jwknutson17

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I am having a rifle built in .300 PRC, maybe the first in The Netherlands. 28” Lothar Walther barrel, Ultimatum Deadline action, Bix'n Andy trigger, chassis to be decided. Very excited!

However, I am a bit in doubt as to what twist rate I should use. I see that the Bergara, Christensen and MRAD rifles are in 1:8, the Ruger RPR .300 PRC uses 1:9. Most people here are talking 1:9.

What should I use, assuming I will first shoot the 225 ELD-M ammunition and later handload, probably with the 225gr ELD-M, but perhaps also with the 230gr A-Tip and maybe even the 250gr A-Tip.

Hornady recommends 1:9 for the 230gr A-Tip and 1:8 for the 250gr A-Tip. Dilemma! What’s the best compromise now? I think for the 225gr ELD-M and the 230gr A-Tip I should go with 1:9. Will I then be unable to use the 250gr A-Tip?

Your advice and insights are most welcome!
I would go 1/9 and stick to the 215/230 pills. The 250 really cant get going fast enough in the PRC to be beneficial. Run some numbers and with them and see if it makes sense to you. The 9 is going to be your best bet with the 230s.
 

Ledzep

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1:9 Will stabilize the 250 in most conditions, too. So even if you want to try it out, you'll be fine.

However, in most cases if you run the numbers the 230 and 250 balance out to be more or less equivalent. Almost exactly the same super-sonic range, almost exactly the same windage within 2500yd... The 230 is slightly flatter trajectory to a point (1.25-1.5 miles), but the 250 does produce more visible splash down range very reliably (not that the 230 doesn't produce good splash, though).
 
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Merovingian

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I am having a rifle built in .300 PRC, maybe the first in The Netherlands. 28” Lothar Walther barrel, Ultimatum Deadline action, Bix'n Andy trigger, chassis to be decided. Very excited!

However, I am a bit in doubt as to what twist rate I should use. I see that the Bergara, Christensen and MRAD rifles are in 1:8, the Ruger RPR .300 PRC uses 1:9. Most people here are talking 1:9.

What should I use, assuming I will first shoot the 225 ELD-M ammunition and later handload, probably with the 225gr ELD-M, but perhaps also with the 230gr A-Tip and maybe even the 250gr A-Tip.

Hornady recommends 1:9 for the 230gr A-Tip and 1:8 for the 250gr A-Tip. Dilemma! What’s the best compromise now? I think for the 225gr ELD-M and the 230gr A-Tip I should go with 1:9. Will I then be unable to use the 250gr A-Tip?

Your advice and insights are most welcome!
You need to decide if you really want to shoot that 250 pill. If the answer is yes, then you probably should go with the 1:8. Otherwise the 1:9 will handle most everything except the 230 SMKs.
 

LakuNoc

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Not sure you gaining much with 250gr over 230gr. 230 A-tip has high BC that within 2000 yards i think 230 will dominate.
If you want More change caliber to 338 or 300 Norma mag but they also have their disadvantages.
 

TripleBull

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Not sure you gaining much with 250gr over 230gr. 230 A-tip has high BC that within 2000 yards i think 230 will dominate.
I bet you are right. We're still shooting factory Hornady 225 ELDMs and they are performing well considering the SD is fairly high (~20). Our rifle has a 30" Bartlein 1:9 that's not fully broke in yet (120 rounds) and is running in the 2975-3000 fps range. Today we shot it at 2400 yards and got hits and good consistency, so I'm pretty happy. I just have to get off my lazy butt and load up some of the 230 A-tips.
 

Merovingian

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I load my 215 bergers to 3.700 which is 20 off the lands with the Sammi spec reamer spun up by Dave Tooley. Your COAL will be shorter with the 225s also. So looks like you should be good.
230 Berger, 230 SMK. CBTO jam on both fall where I’d expect between 2.8368 - 3.005 (actually almost dead center) but once there, COL is beyond 3.70. Jump at 3.70 COL: 230 Berger .013, SMK 230 .140 (yeah 1-4-0). Disappointed to lose that much seating depth flexibility. Noticing short CBTO’s at max COL with any pills?
 

Simia Dei

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Hi,

Not sure if it may help you or not but NIOA has a few Rugers in 300PRC....actually I am pretty sure this does not help you as I have a feeling you are looking for reamer, dies, etc type of possession :)

Sincerely,
Theis
Yeah, am just chasing if anyone has gotten brass and dies into Aus yet, will have the rifle sorted soon enough. Will have to stick with ADI powders as RL26 is rocking horse shit here, along with Berger projectiles
 

LakuNoc

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Ordering magazine for my 300PRC in KRG whiskey 3 chassis. Going between Accurate Mag3.850 MDT and AICS magazine. all of them are 3.850. Anybody prefers one over other?
Thank you
 

b2lee

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Ordering magazine for my 300PRC in KRG whiskey 3 chassis. Going between Accurate Mag3.850 MDT and AICS magazine. all of them are 3.850. Anybody prefers one over other?
Thank you

Well...I don't have an Accurate....but I prefer the MDT over the AICS....and I prefer the MDT 338LM magazine over the MDT 300WM once I got the feed lips bent right....might be a chassis/Action specific preference though...I have the MDT ACC with a Defiance Deviant Tact.
 

LakuNoc

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Well...I don't have an Accurate....but I prefer the MDT over the AICS....and I prefer the MDT 338LM magazine over the MDT 300WM once I got the feed lips bent right....might be a chassis/Action specific preference though...I have the MDT ACC with a Defiance Deviant Tact.
Thank you i order MDT.
Not big selection of reloading dies for 300 PRC. I hope forster and redding will release with their competition series soon.
 

b2lee

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Thank you i order MDT.
Not big selection of reloading dies for 300 PRC. I hope forster and redding will release with their competition series soon.
I bought the Hornady dies with the micro adjust seater. My plan was to get this set and later get a 'better' set....but to be honest...if my groups get better due to changing dies...well I just don't see how that can happen. The limiting factor right now is ME...not the equipment nor the reloading process. I am not a candidate for testing out various primers at 1000 yards and seeing which one I like best.

Or...maybe I'm just stupid lucky to have hit on the right load with very little development with 230gr A-tips and Retumbo powder and Federal Match LRP....and what most people call....crappy ole Hornady brass.

Also...I'm out of Retumbo....HELP!!!!
 
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man32ahan

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Question all, I ordered the Hawkins CIP bottom metal. Inletted by LRI.
Order the accurate mag 300WM 3.85 (atleast I thought anyways)

I go to seat the magazine and it has a lot of play in the magwell. So much play to the point I can wiggle it and it disengages from mag catch and falls out.
This is on empty magazine.
Is this normal or do I have non CIP length magazine?
It fits tight on regular LA bottom metal for reference.
I uploaded some photos of gaps to show the best I could.
 

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man32ahan

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Can you measure the inside dimension of the magazine?
What should the inside dimension be?
I don’t have in front of me right now but roughly measured internal length and was like 3.6. Overall length didn’t appear to be 3.85.
I ordered from Altus Shooting. I guess I didn’t look at packaging or anything and assumed it was the right one. I may have been sent the wrong mag.
 

b2lee

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I believe the inside should be somewhere around 3.76" with the 3.85" CIP mags.

the 3.715" Outside are like 3.625" inside.
 

LakuNoc

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I bought the Hornady dies with the micro adjust seater. My plan was to get this set and later get a 'better' set....but to be honest...if my groups get better due to changing dies...well I just don't see how that can happen. The limiting factor right now is ME...not the equipment nor the reloading process. I am not a candidate for testing out various primers at 1000 yards and seeing which one I like best.

Or...maybe I'm just stupid lucky to have hit on the right load with very little development with 230gr A-tips and Retumbo powder and Federal Match LRP....and what most people call....crappy ole Hornady brass.

Also...I'm out of Retumbo....HELP!!!!
Very nice!
what is your setup if you dont mind asking and did you try H1000 with 230 a-tip?
 

b2lee

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Very nice!
what is your setup if you dont mind asking and did you try H1000 with 230 a-tip?
I can't find H1000 or RL-26 anywhere...if you know of a place...let me know :)

My setup is a 28" Bartlein 1-9TW at 28" with a Defiance Deviant Tactical with 20MOA rail.....and a blended APA Lil'B brake....chambered and fluted by Southern Precision Rifles.

Gently laid into an MDT ACC chassis with the adjustable grip....all currently cerakoted in FDE.

Powered by a TriggerTech Diamond.

Glass is currently borrowed....Razor GenII 4.5x27 MIL cradled by a Spurh 30MOA...in FDE.

Or were you talking about my reloading setup...heh...now that is toooo long of a list to talk about.
 
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LakuNoc

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Did anyone hear about any new release of 300 PRC brass anytime soon from any other manufacturers. Now its only Hornady.
 

TripleBull

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b2lee

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To be honest....I'm really looking into purchasing at least 100 pieces from them. For $100 I can have them do a custom fitting to my rifle using fired brass or a casting....which I won't do. For a one time $50 setup fee I can have customized head stamps....why use a color code of sharpies when you can literally have your name or PRS number stamped to the head.

This is CNC'd brass from rod....not drawn from an ingot. It is a specific alloy for long term reloading...not some blend made to look pretty out of the box and ease of manufacture....which is why you guys hate the Hornady brass.

It is a labor/time intensive process...hence the price. I used to be cheap...but the more I spend on low end junk I end up replacing...the more I'm thinking of simply buying the good stuff to start with.
 
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JakeM

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To be honest....I'm really looking into purchasing at least 100 pieces from them. For $100 I can have them do a custom fitting to my rifle using fired brass or a casting....which I won't do. For a one time $50 setup fee I can have customized head stamps....why use a color code of sharpies when you can literally have your name or PRS number stamped to the head.

This is CNC'd brass from rod....not drawn from an ingot. It is a specific alloy for long term reloading...not some blend made to look pretty out of the box and ease of manufacture....which is why you guys hate the Hornady brass.

It is a labor/time intensive process...hence the price. I used to be cheap...but the more I spend on low end junk I end up replacing...the more I'm thinking of simply buying the good stuff to start with.
You think one 100pc of brass could last the barrel?
 

b2lee

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You think one 100pc of brass could last the barrel?

I know I keep bringing this up...but Tom Sarver set the 1000yd world record group size with a similar sized piece of brass....338LM necked down to 308...and the brass was on its 58th firing. So....in his case... 58x100 would be 5800 rounds down that barrel...so...yes...it would outlast the barrel.

However, since you never know what kind of comp you will get yourself into...I'll end up getting 200 pieces.
 
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Steel head

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I didn’t realize this was machined brass.
That changes my thoughts on it.
I wish they’d sell me 10 pieces as I’d love to try it in my 7 saum.
 

JakeM

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I know I keep bringing this up...but Tom Sarver set the 1000yd world record group size with a similar sized piece of brass....338LM necked down to 308...and the brass was on its 58th firing. So....in his case... 58x100 would be 5800 rounds down that barrel...so...yes...it would outlast the barrel.

However, since you never know what kind of comp you will get yourself into...I'll end up getting 200 pieces.
Cool, if the prc has the same life as the .300wm it will get about 1000 1200 rounds down the tube, so only 50pc would be needed, and that would out last the barrel.
 

b2lee

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They have a 50pc minimum and....if for hunting...cool...but I don't know many comps where you can do much less than 100 rounds. If for snitz and giggles...and you are shooting steel at your own place...well then...I'd be jealous.
 
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JakeM

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They have a 50pc minimum and....if for hunting...cool...but I don't know many comps where you can do much less than 100 rounds. If for snitz and giggles...and you are shooting steel at your own place...well then...I'd be jealous.
Yeah, I shoot my own steel and if I do get into comp it will most likely be 600yr Ft/r with a .308win
 

LakuNoc

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I didn’t realize this was machined brass.
That changes my thoughts on it.
I wish they’d sell me 10 pieces as I’d love to try it in my 7 saum.
Can you explain what do you mean “machined brass”?
whats so different about it.
I would consider buying but not sure about quality?
 

Steel head

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Can you explain what do you mean “machined brass”?
whats so different about it.
I would consider buying but not sure about quality?
That brass is machined on a lathe from bar not drawn like regular brass.
Should be stronger and more consistent.
 

Steel head

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Thank you for explanation.
I will try 50 and will let you guys know how it goes.
there’s been talk from good sources that machined brass will actually allow higher pressures to be run so at normal pressure it should last really well.

I’m curious on how long it takes you to get it and looking forward to a report.
 
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LakuNoc

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there’s been talk from good sources that machined brass will actually allow higher pressures to be run so at normal pressure it should last really well.

I’m curious on how long it takes you to get it and looking forward to a report.
I ordered brass will have to wait 30 to 60 days. Will make video and do measurements and testing. Owner said they tried brass and they stoped at 25 firings primper pockets were still tight. Soon as i get it i will do full review.
 

b2lee

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I bought 200 more 230gr A-Tips today....now if I could get my hands on more powder.

I opened my safe yesterday and my rifle started cussing me. "Do I look like a queen to you? I ain't about to sit here in this safe all winter....you best get me out and get some mud on me....a little carbon on my brake.....I needs to fill your squeeze!!! GET ME OUTTA HERE!"

I guess I'll go Wednesday on my next day off...as long as it is somewhat nice outside.
 

THEIS

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Hi,

I would dare anyone to find a piece of brass that can hold the tolerances that the RCC brass holds :)

I only know one other company and they currently do not sell standalone brass..only loaded ammunition.

It is impossible for cup and draw to hold the tolerances of .0005 that RCC operates at.

Sincerely,
Theis
 

b2lee

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Theis...I agree...but it isn't just the 1/2 thou tolerance...it is also the alloy used and the process of machining the brass to size and not drawing/annealing/drawing/annealing....for many cycles. The heads and primer pockets should be a lot better than drawn brass...and stand up to higher pressures on our quest to push these big bullets at insane speeds.

Also, just ordered 8lbs of N565 to try out. I'll be making an RCC purchase soon as well...hell...why wait?...I'll do that now...
 

NVScout

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Has anyone finished a load work up on the 230 A-tips yet ? If so where did you end up jumping them ?
 

jwknutson17

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I haven't snagged up any Atip 230s yet but I'm curious also.

Was Just about to order a 1.350 HV 31" 9twist blank for DT to spin up and then I'll get to work on the 230 A-tips.