300 PRC update

NVScout

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Question for you all on H1000 loads behind a Berger 215 Hybrid Target.

I recently had a 300 PRC built (Borden Action, Lilja 25” Barrel 1:9 twist. Using ADG brass.)

I called Berger for recommended min/max load data. They said for the 215 min is 80.0 and max is 84.1 gr H1000.

To me, this seems very high. Their min is above the max published by Hornady for both the 212 and 220 gr bullets. I’ve read through most of the 68 pages of posts here...thanks for all the info!! And seems like most of you using H1000 with Berger 215 are ending up in that 78-79gr range. I don’t know that I’ve seen a single post here trying anything above 81gr.

any input is greatly appreciated!!!
No pressure signs at all with ADG brass and 26” proof carbon
 

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b2lee

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    @DellaDog that barrel will start speeding up just a bit over the next 50 rounds or so. What did you use to measure velocities? I keep wanting to rezero my rifle because I'm shooting high...then realize...duh...I have a MagnetospeedV3 on the end and the shots are deflecting high. After next weekend I'll have over 1100 rounds down the barrel....I'll go shoot a few 5 round groups to measure muzzle velocity and then grouping....this thing can't last that much longer as a competitive ELR barrel.
     

    DellaDog

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    Labradar. I shot the first 25 rounds at 76 grains and watched the speed build from mid 2800 (2840) to 2900.
    Took the next 25 and shot 77,77.5, and 78 to see what speed it liked & about where they plotted.

    It's just a test to guess where it'll like speed wise. And I'm guessing low 2900, regardless of the charge that gets me there.
    76 & 77 were close to 2900 & plot similarly - and an obvious scatter at 78.
    I'm plotting speed really, not charge weight at this time.
    (I add 3 clicks and aim at the cross hair diamonds to print in the center circle.)
     

    b2lee

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    It's amazing that awe can say 'low 2900' all casually with a 230 grain bullet...I really do love this cartridge. I'll be pushing most of mine over 3000fps to a mile target next weekend... 230 A Tips...and then surely...surely this barrel is toast.
     
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    JB.IC

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    Just got some n565. 70gn a good starting point? Also what’s people seeing for max load? 230gn Berger. I want an idea of where to stop. I hate pulling bullets.
     

    TripleBull

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    Just got some n565. 70gn a good starting point? Also what’s people seeing for max load? 230gn Berger. I want an idea of where to stop. I hate pulling bullets.
    I ran a ladder from 76.0 to 77.8 grains of VV N565 without pressure signs, then an OCW from 77.2 to 78.4 grains, still with no pressure signs.

    ChargeMVSt DevES
    77.2​
    2937.7​
    8.7​
    10.0​
    77.4​
    2951.3​
    3.1​
    6.0​
    77.6​
    2965.8​
    12.0​
    31.0​
    77.8​
    2973.7​
    5.1​
    11.0​
    78​
    2982.7​
    1.5​
    3.0​
    78.2​
    2992.7​
    5.1​
    10.0​
    78.4​
    3005.7​
    2.1​
    4.0​

    But your gun will be different so follow the usual rules, start low, progress cautiously. See here:

     

    Rocketmandb

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    I ran a ladder from 76.0 to 77.8 grains of VV N565 without pressure signs, then an OCW from 77.2 to 78.4 grains, still with no pressure signs.

    ChargeMVSt DevES
    77.2​
    2937.7​
    8.7​
    10.0​
    77.4​
    2951.3​
    3.1​
    6.0​
    77.6​
    2965.8​
    12.0​
    31.0​
    77.8​
    2973.7​
    5.1​
    11.0​
    78​
    2982.7​
    1.5​
    3.0​
    78.2​
    2992.7​
    5.1​
    10.0​
    78.4​
    3005.7​
    2.1​
    4.0​

    But your gun will be different so follow the usual rules, start low, progress cautiously. See here:

    What are your barrel specs again? I've got a few pounds inbound that I'm going to play with.
     

    DellaDog

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    Just picked up a couple jugs of RL26 to try alongside H1000. I’m guessing back off a couple grains? Maybe 74.4 vs 76 for H1000 & 230 Hybrid?

    Sure hope the rumors of it going to shiite above 85* are false. 85* is a cool summer day here in TX.
     

    Rocketmandb

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    Just picked up a couple jugs of RL26 to try alongside H1000. I’m guessing back off a couple grains? Maybe 74.4 vs 76 for H1000 & 230 Hybrid?
    It depends on what you're trying for. You should be well within acceptable limits, but 74.4 is probably going to get you more than what 76 of H1000 will get you. The load data (at least the sheet I've got) from Hornady is off (to the fast side) on the RL-26 fps estimates. I use 73.4 gr in my 28" Bartlein to get me ~2865 fps. A friend used 74.8 to get about 2900 fps out of a 26" barrel. If you want to bruise your brass and run it like a banshee (like @b2lee does) then you can get to the upper 2900s.

    Sure hope the rumors of it going to shiite above 85* are false. 85* is a cool summer day here in TX.
    I don't see that. Breaking in my new 300 PRC a couple weeks ago, I was running 73.0 gr and getting 2850 or so in 95 degree heat.
     

    TripleBull

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    Just picked up a couple jugs of RL26 to try alongside H1000. I’m guessing back off a couple grains? Maybe 74.4 vs 76 for H1000 & 230 Hybrid?
    Good plan. Based on other rifle data, I set up a ladder from 76.0 to 77.8 of RL26. I got mild ejector swipe and primer flattening and stopped the ladder test at 76.8.
     
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    b2lee

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    I have 20 pieces of 8x fired Hornady brass that actually still pass the primer pocket gauge...but won't after Friday. I'll practice some for the 1 mile GBA Nationals and the 1000yd Tactical Division......put a few rounds down range.....I've only ever popped one primer at the loads I'm running. I doubt the primer pockets will pass the gauge on the next check with a load that may push 3000fps with a 230 A-Tip. This week I've prepped my brass better than anything I've ever prepped before. I've weighed everything down to .02+/- grains.....I've volume measured all brass....annealed....every primer pocket is uniformed....deburred....every bullet measured 6 ways from Sunday.

    Thus...when I do poorly...it will be on me :) Actually....I don't expect to do too well with almost 1100 rounds on the barrel once the record targets will be shot. But I will have fun...no doubt.
     
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    JB.IC

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    I ran a ladder from 76.0 to 77.8 grains of VV N565 without pressure signs, then an OCW from 77.2 to 78.4 grains, still with no pressure signs.

    ChargeMVSt DevES
    77.2​
    2937.7​
    8.7​
    10.0​
    77.4​
    2951.3​
    3.1​
    6.0​
    77.6​
    2965.8​
    12.0​
    31.0​
    77.8​
    2973.7​
    5.1​
    11.0​
    78​
    2982.7​
    1.5​
    3.0​
    78.2​
    2992.7​
    5.1​
    10.0​
    78.4​
    3005.7​
    2.1​
    4.0​

    But your gun will be different so follow the usual rules, start low, progress cautiously. See here:

    RCC brass? That’s what I have. Just waiting on my 30” Bartlein barrel to get here
     

    b2lee

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    In the morning I'll make the 3.5 hour trek up North to TVP and shoot in the GBA Nationals. It will be interesting to see how competitive I can be with almost 1100 rounds on this 300PRC Bartlein barrel. Very interested in what my vertical stringing will be at 1 mile....and if I can repeat a 5" group in the 1000yd Tactical Division. Weather is probably going to suck due to the passing hurricane left overs....but we'll all be shooting in the same conditions.

    At least I got a reservation for a king size bed and hot hot shower to wash away the failure.
     

    rpsully

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    This is my first post so go easy! I wanted to share my info because you all were very helpful to me with your information.
    I needed a lightweight precision rifle that was rock solid for tortures of elk hunting, in a caliber that was stable for long range. So...started buying parts. Below is list:
    Manners EH1
    Lone Peak Fuzion Ti
    Proof Research Sendero 20”
    Triggertech Diamond
    Hawkins Precision Oberndorf
    TierOne tactical bipod (cf)
    TierOne rings
    Kahles K525i
    Built by DMR LLC
    Thing is shooting match hornady 225gr factory loads at 2840fps.

    507FB219-14D5-4C1D-80F4-B4699F82628C.png

    076B16E9-94AB-46DE-9C81-23F55939A3EB.jpeg

    72CFBE21-B98B-413A-941E-706927694194.jpeg
     

    JB.IC

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    N565 76gr slight compression // 0.002” NT // 0.03” off lands // BR2 // RCC // 230 HT // MV 2954 // SD 8.22 // 88 degrees // 28.51inHg // 56%
    30” Bartlein 8 twist Omega300

    AA195984-6B0B-4B35-9020-D5DCAA8827FB.png
     

    Pho

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    This is my first post so go easy! I wanted to share my info because you all were very helpful to me with your information.
    I needed a lightweight precision rifle that was rock solid for tortures of elk hunting, in a caliber that was stable for long range. So...started buying parts. Below is list:
    Manners EH1
    Lone Peak Fuzion Ti
    Proof Research Sendero 20”
    Triggertech Diamond
    Hawkins Precision Oberndorf
    TierOne tactical bipod (cf)
    TierOne rings
    Kahles K525i
    Built by DMR LLC
    Thing is shooting match hornady 225gr factory loads at 2840fps.

    507FB219-14D5-4C1D-80F4-B4699F82628C.png

    076B16E9-94AB-46DE-9C81-23F55939A3EB.jpeg

    72CFBE21-B98B-413A-941E-706927694194.jpeg
    20 inch barrel...whoa! And I thought I was short at 21".
    If I'm not mistaking, you're the new shortest.
    Unless someone has an 18"?
     

    TripleBull

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    Rocketmandb

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    Since you can get it as an add-on, I decided to wait. I wanted to read around about standard versus low force options. I'll typically be around 2 or 3 thou of neck tension. You got standard?

    ETA:

    I've got the standard. The Wilson dies will give you great consistency from a concentricity perspective, but that still leaves neck tension consistency. When I first got the K&M press, I was surprised at the variation in seating pressure that I was getting. It was what led me to move to using a mandrel. Now, 85-90% fall within +/- 10 pounds, and those that don't get outsorted as fouling/fun rounds.
     

    TripleBull

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    Understood. I'm a mandrel believer for the same reason. Likewise, neck bushings or custom ground sizing dies are the ticket for minimum working of the necks. For the 300 PRC, I plan to move to a custom sizing die with a bushing, hopefully this fall or winter. I've been wanting to move to and arbor press with the Wilson seating dies for a long time but the list is always longer than the wallet is fat.
     

    Rocketmandb

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    For the 300 PRC, I plan to move to a custom sizing die with a bushing, hopefully this fall or winter.
    I think I've got to get a new custom die. Even though my new 300 chamber was made using the same reamer, it was cut on a new CNC machine with tighter tolerances, which I'm presuming led to the slightly smaller chamber I measured (~.001 - .0015). Now, my current custom die doesn't size down enough on rounds out of the new chamber, and smaller chamber = higher pressure = faster rounds.

    I took the new 300 out yesterday to put rounds 51-100 through it, loaded at the same charge weight as my last, and they were running about 30 fps faster (2889 fps vs ~2860). That took me out of the accuracy node, and caused high ES and SD, not to mention mediocre grouping.

    I also tested a new hillside steel target stand I came up with. I'll be putting out a video showing how to construct (extremely easy and quick) and me hitting it hard at 850 yards to test its viability. One small modification and it will work really well. I should work on pretty much any slope that you could walk up to place it.
     

    b2lee

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    Saturday the winds were about 20mph with 30mph gusts.... switchy and twitchy as hell.....the dreaded 8 o'clock and then suddenly 4 o'clock winds. They were pushing 1 out of 5 off paper and giving me an unscoreable target :(....at 1 mile.

    With 1187 rounds through the barrel...my last group at 1 mile had an estimated 6 inch verticle...but my horizontal with the twitchy winds pushed one 10" off the paper for a Zero score. It would maybe have been an 18" 5 shot group....almost all horizontal.

    The point being...so far....the barrel still has some long range life in it. We will see in a few weeks when it gets to go out to maybe 3000 yards....most likely 2700yds.
     

    808caliber

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    Anyone use a bdl setup for the 300prc? Waiting on terminus kratos 4" box to fot a wyatts bdl setup. Joel said the next batch should have the 4" accomodation. Mahalo
     

    JB.IC

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    I took the new 300 out yesterday to put rounds 51-100 through it, loaded at the same charge weight as my last, and they were running about 30 fps faster (2889 fps vs ~2860). That took me out of the accuracy node, and caused high ES and SD, not to mention mediocre grouping.
    This very thing happened to me. I went to my 2100yd range. I only had 14 rounds on the new barrel. But I chrono’d all my shots and you could watch the rounds climb in mv and slip out of the accuracy node. I only have 43 round down the barrel now but it climbed 41 FPS. It settled around into a velocity node around 2950 FPS. At which time I was getting consistent hits at 2100yds.
     

    Rocketmandb

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    This very thing happened to me. I went to my 2100yd range. I only had 14 rounds on the new barrel. But I chrono’d all my shots and you could watch the rounds climb in mv and slip out of the accuracy node. I only have 43 round down the barrel now but it climbed 41 FPS. It settled around into a velocity node around 2950 FPS. At which time I was getting consistent hits at 2100yds.
    My thing is a little different. This new barrel should be close in performance to the last barrel - same reamer, same smith, same manufacturer, same twist, same length. But the chamber is a bit smaller because the smith used a new CNC machine to cut it, which is more accurate and has less wobble - to the tune of about a thousandth of an inch. So I'm seeing slightly higher pressures, and thus velocity.
     
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    JB.IC

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    Anyone using a universal primer decapper?
    Curious which one to purchase. The one I use for my 6.5 is to small vertically
     

    Rocketmandb

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    Anyone using a universal primer decapper?
    Curious which one to purchase. The one I use for my 6.5 is to small vertically
    Harvey Deprimer all the way. Very quick to use, less effort than a press, and you can do it anywhere. Also, the pins are like... well... steel. Because they are hard steel. I swear they feel like AR500 (don't know what they are). I "wasted" money on extra pins when I bought it because I've never come close to bending or breaking a pin.

     

    b2lee

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    Harvey Deprimer all the way. Very quick to use, less effort than a press, and you can do it anywhere. Also, the pins are like... well... steel. Because they are hard steel. I swear they feel like AR500 (don't know what they are). I "wasted" money on extra pins when I bought it because I've never come close to bending or breaking a pin.

    Never seen that one before. I'd probably rather have that one over the Frankford Arsenal one that everyone seems to be using....eventhough the Harvey doesn't have a little catch reservoir.

    Personally I use the MIghty Armory Magnum on a separate old RCBS IV press that is dedicated to non-precision functions.
     

    Rocketmandb

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    Never seen that one before. I'd probably rather have that one over the Frankford Arsenal one that everyone seems to be using....eventhough the Harvey doesn't have a little catch reservoir.

    Personally I use the MIghty Armory Magnum on a separate old RCBS IV press that is dedicated to non-precision functions.
    I've played around with the Franklin, and it works fine, but there is an elegant simplicity to the Harvey that I love. And as to the catch reservoir, I deprime over a trashcan, and don't miss it at all.

    Tip if you buy the Harvey: You don't need both large rifle and small rifle primer pins. They make both, but I just keep the small rifle in all the time and it works like a champ - no need to change.
     

    JB.IC

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    I've played around with the Franklin, and it works fine, but there is an elegant simplicity to the Harvey that I love. And as to the catch reservoir, I deprime over a trashcan, and don't miss it at all.

    Tip if you buy the Harvey: You don't need both large rifle and small rifle primer pins. They make both, but I just keep the small rifle in all the time and it works like a champ - no need to change.
    Thanks!! I’m going go give the Harvey a try. It will also allow me to deprime my 375EnABELR according to the max case specs on their website.
     

    jeepguy88

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    Think I have my 300prc finally dialed in. Been a real struggle between trying to order things in stock and reloading equipment issues. I got a Browing Xbolt Max Long Range. 26" barrel 1/8 twist. Feel like I have it dialed in now.
    225ELDM
    Hornady Brass
    Cci 250 primers
    78.1gr Ramshot Magnum
    Ave@2871
    Sd 7
    Es 18
    5 Shot spread.
    (Prefer 10 rounds for info, but I'm running low supplies)
    Was playing with the 212ELDX with H4831 but I've ran out of 212s and H4831. So I'll be hunting with the ELDMs. Had the ELDX avg. @3001.sd 6. Not sure how the ELDx would have done at 1000+. Probably would have been fine.

    Found out my old balance beam doesn't balance well anymore, that was probably the biggest thing to work out. Haven't messed with neck tension before either. Learned all about that. My velocity had 20-80fps swings. Shot up a few hundred rounds before I figured those two things out. Finally got the velocities down, but the gun wasn't shooting well. Also learned not to try for accuracy while the magneto speed is attached. Lol. My other bull barrel rifles this wasn't a problem. Accuracy was still missing. Got consistent velocity but bullets everywhere.
    Muzzle brake.
    I switched muzzle brakes so I could see my hits. It was my muzzle brake giving me issues. Put my suppressor on and I was good to go. Phew. Been out shooting twice a day almost daily for the last month trying to get this thing going. Next outing I will try 2000yards for giggles :)
    Here is my 620yard group with the ELDMs
    Screenshot_20200903-160017.png
    Here is my 3 shots at 1mile. On a 20x20 target. My first time at a mile. I have a bushnell scope and ran out of dial. Was holding over. My spotter walked me in. 2nd shot was just a few inches above target.3rd shot connected. 4th and 5th hits. Wind was blowing 6mph. Dialed a lil for wind too and it worked.
    Screenshot_20200903-193226.png
    *Had the welder out and I patched a bunch of holes in all the targets. Before I took a photo.
     

    Devildog

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    @jeepguy88 what’s your impression of the Ramshot Magnum? Powders getting so hard to find and other then a little vit N 565, ramshot magnum seems to be available.
     

    jeepguy88

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    @jeepguy88 what’s your impression of the Ramshot Magnum? Powders getting so hard to find and other then a little vit N 565, ramshot magnum seems to be available.
    It doable.
    It's available. Lol.
    I was able to order 6lbs from powder valley. Last month.
    No complaints. This is my first magnum, so don't really have much to compare too. I was having trouble finding anything in stock, and saw a write up on ultimate Reloader using Ramshot Mag. Also looking at Ramshot load data they don't have published data for the 225eldm. I took a small gamable trying it out, but again couldn't find much else and I'm short on time.
    Got it work for me using the 225elms. I thought the 212s didn't like the Ramshot, so I tried the H4831 before I found it was my scale giving me fits. Ran out of 212s before I could try the 212s with Ramshot. Seems like accuracy wise some people are getting a tiny bit better groups with different powders.
    Overall I'm happy with it.
     
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    jeepguy88

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    Something else worth noting, when I did my velocity test with ramshot and 225eldms I got to 78.8 and got some ejector marks. Stopped there. 78.5gr was 2999fps and 78.6gr was 3001fps. Thought 78.5 would have been the super sweet spot. I loaded 5 @ 78.5gr. 4shots where 2997-3002fps and I had 1 at 2865fps. Not sure If that was my brass prep or? Decided to go with the lower node of 2871fps.
     

    MikelLee

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    Getting into ELR, after a long time not shooting.
    Of course maybe not a great idea right now with very little ammo, but I have components enough for a season or two. Bought 300 PRC brass and Atips. Have some H1000 and H4831, and 215M primers.

    I'd like to get a 300 PRC, just for ELR, not hunting.

    Looking for suggestions on possible build around 2k or less? Or maybe a good rifle to start with. Rifle only, I have some good scopes.

    I was thinking a Bergara HMR or LRP. Would like some suggestions on custom or semi-custom builds or other options around the $2k budget?

    I used to shoot and reload a lot. Used to do CMP years ago as well, so I've got some fundamentals.

    Thanks
    Mike
     
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    TripleBull

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    Getting into ELR, after a long time not shooting.
    Of course maybe not a great idea right now with very little ammo, but I have components enough for a season or two. Bought 300 PRC brass and Atips. Have some H1000 and H4831, and 215M primers.

    I'd like to get a 300 PRC, just for ELR, not hunting.

    Looking for suggestions on possible build around 2k or less? Or maybe a good rifle to start with. Rifle only, I have some good scopes.

    I was thinking a Bergara HMR or LRP. Would like some suggestions on custom or semi-custom builds or other options around the $2k budget?

    I used to shoot and reload a lot. Used to do CMP years ago as well, so I've got some fundamentals.

    Thanks
    Mike
    Probably not what you are looking for but a local guy bought one of these and it's a good shooter for the $:

     

    Devildog

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    I’m being lazy here, what’s the consensus on reloading dies? I mostly use redding or forsters dies but I don’t see 300 prc dies on forsters site, I can get redding type s which I‘m good with just not sure if the seating stem works with A tips. Saw hornady’s match grade set they look ok they have a seating stem for the A tips but no one has a .334 bushing for sale.
     

    Rocketmandb

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    I’m being lazy here, what’s the consensus on reloading dies? I mostly use redding or forsters dies but I don’t see 300 prc dies on forsters site, I can get redding type s which I‘m good with just not sure if the seating stem works with A tips. Saw hornady’s match grade set they look ok they have a seating stem for the A tips but no one has a .334 bushing for sale.
    I've been playing with a couple different dies lately due to my new chamber being smaller than my last. The issue I found with the Hornady dies is that they are fairly large in diameter - at least .532, with a spring back to .533 after sizing. If your chamber is at all to the small side, then this is an issue.
     
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    b2lee

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  • Dec 30, 2018
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    I’m being lazy here, what’s the consensus on reloading dies? I mostly use redding or forsters dies but I don’t see 300 prc dies on forsters site, I can get redding type s which I‘m good with just not sure if the seating stem works with A tips. Saw hornady’s match grade set they look ok they have a seating stem for the A tips but no one has a .334 bushing for sale.
    How about a Redding Type S with .334 or appropriate bushing. Take the decapping pin and expander ball out and throw it somewhere. Get you a mandrel die with the appropriate sized mandrel for your brass thickness and desired neck tension....then get an LE Wilson 300PRC Bullet seating arbor press die.

    Want to talk about near perfect rounds...these things will eliminate any excuses for shooting poorly....atleast from that part of your reloading/shooting.
     
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