I know they do. Paul ordered me a Proof Carbon Fiber 300 PRC Savage Prefit as well as an Proof AI AXMC 6.5 PRC steel prefit. Call him and he will take care of you.
- Thread starter DAVETOOLEY
- Start date
Do you know if he does custom twist rates and Desert Tech barrels?
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Sorry, I don't know. I've only dealt with him on Proof prefit barrels and those are limited to Proof's twist rate offerings. .
1:10 will cover most anything on the market right now up to 230gr. May be on the edge with some of the super heavies. I went gain twist 1:9.5 to 1:9
Hopefully the 9 twist will pay off if Berger gets the 245 EOL to market.
I'm doing 9's in everything even though a 10 will cover anything we currently have available. These super heavy bullets really don't interest me. Extremes have always been problematic.
Update from the range:
I ran two sets of work ups today. One with a retry of Retumbo (see below as to why) and one with seating depth using my current "champion" load of 76.2 gr H1000. The second set was seating depth at 2.5, 5, 7.5, 10, 12.5 and 15 thousandths off the lands. I also sighted in and used my new Razor HD 4.5-27 for the first time - quite happy with it.
First the Retumbo: after returning from my last time out, I noticed that two of the screws on my rail were loose - think that had something to do with my accuracy issues? So I decided to retry Retumbo. This time I started at 76.1, and went up to 77.3 at .3 gr increments.
All groups were 4 shots at 200 yards using ELD 225
76.1:
Group: 1.07"
Average: 2846
ES: 12
SD: 5.6
76.4:
Group: .76"
Average: 2860
ES: 15
SD: 7.0
76.7:
Group: 2.01"
Average: 2863
ES: 21
SD: 8.6
77.0:
Group: 1.15"
Average: 2886
ES: 32
SD: 11.5
77.3:
Group: 1.22"
Average: 2892
ES: 21
SD: 9.5
I'm liking the 76.4 gr Retumbo load quite a bit. I'll probably pit it against the 76.2 gr H1000 load next time out and see which wins.
On the seating depth test, one group stood above. It had one flyer that took the group size out to 1.08" - but the other three were touching with a group size of .355" center to center. The average velocity as 2866 ft/s, ES of 5, SD of 3.6. This seating depth was 12.5 thousandths off the lands.
Rifle with the new scope (albeit temporary until my new build gets done):
I ran two sets of work ups today. One with a retry of Retumbo (see below as to why) and one with seating depth using my current "champion" load of 76.2 gr H1000. The second set was seating depth at 2.5, 5, 7.5, 10, 12.5 and 15 thousandths off the lands. I also sighted in and used my new Razor HD 4.5-27 for the first time - quite happy with it.
First the Retumbo: after returning from my last time out, I noticed that two of the screws on my rail were loose - think that had something to do with my accuracy issues? So I decided to retry Retumbo. This time I started at 76.1, and went up to 77.3 at .3 gr increments.
All groups were 4 shots at 200 yards using ELD 225
76.1:
Group: 1.07"
Average: 2846
ES: 12
SD: 5.6
76.4:
Group: .76"
Average: 2860
ES: 15
SD: 7.0
76.7:
Group: 2.01"
Average: 2863
ES: 21
SD: 8.6
77.0:
Group: 1.15"
Average: 2886
ES: 32
SD: 11.5
77.3:
Group: 1.22"
Average: 2892
ES: 21
SD: 9.5
I'm liking the 76.4 gr Retumbo load quite a bit. I'll probably pit it against the 76.2 gr H1000 load next time out and see which wins.
On the seating depth test, one group stood above. It had one flyer that took the group size out to 1.08" - but the other three were touching with a group size of .355" center to center. The average velocity as 2866 ft/s, ES of 5, SD of 3.6. This seating depth was 12.5 thousandths off the lands.
Rifle with the new scope (albeit temporary until my new build gets done):
My 300prc rifle got put on hold while I dilly dally with other fun things. Any interest in 5 boxes of hornady match ammo?
Yes how much u looking to get shipped?
I don't want to lose much. $200 to your door. I paid $40 a box.
I don't have a ton of time to post but I went out for round 2 with my 300 prc.... More or less frustrating. The used brass that was 1x fired in my gun last round still caused ejection issues. However the 10 pieces @Rocketmandb donated to the cause all worked flawlessly! So it must be a brass issue as suspected. So it wasn't a complete waste of a trip to the range. My velocity was around 2850 using 74.8 grains of H1000. 225eldm bullets. Cci250 primers. All 10 rounds fit into a quarter
So if my brass would show up and i could find powder and primers... I'd be more than happy.
So if my brass would show up and i could find powder and primers... I'd be more than happy.
Akin to the 1:7 or 1:8 debate with 77gr .223 projectiles. Both work, one spins them slightly faster. I don't think twist rate is something to get caught up about unless you're on either end of the extreme-- blowing up projectiles, or having them hit paper sideways.
I'm not going to get out to do more load development this weekend due to business travel during the week and no time to reload. I do plan a long session the following weekend, and would like to try out some RL33, but load data is hard to come by. Does anyone have a good starting point for 300 PRC? I probably won't shoot much of it, just a few loads to cover a wide spread to get an idea on velocities.
EDIT: Will be shooting 225 ELD
EDIT: Will be shooting 225 ELD
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Have my 300prc all together and working good. 26” Bartlein m24 barrel. Broke in with hornady match 225g. Then shot a few groups with the factory 225g. .4 MOA groups. Loaded some rl26 from 74.4-75.6 with 225eld. Didn’t work very good. +1 moa. Using 215m primers. I pulled 3 factory bullets and weighed 74.0g from each. Thinking I may need to work down from 74.4 to 73?
But, what is the answer? Rocketmandb's brass shows that your rifle has very good accuracy potential, so what will you do differently once you have the brass, powder and primers?
I sent @DAVETOOLEY my new blank today. Broughton 5R, 1-9, heavy palm for my AXMC finished at 30".... Fingers crossed to find some Reloader 26 now...
I will be doing some testing with RL 26 this weekend. I've got a 28" 1-9 and all my data from load testing is in this thread. My current "champion" load with H1000 is 76.2 with the 225. I did a bunch of H1000 testing above published maximums, and started seeing sporadic pressure signs about 1 gr above.
Questions:
-
- Is this a new rifle/bolt? EDIT: It looks like a new rifle from your posts. What action/bolt?
- What pressure signs are you seeing?
I was just asking mainly for inconsistencies between manufacture's reamers referencing several issues that have come to light with the 300 PRC in the last few months.
Welcome to the club! I am waiting for new brass.
I checked the used brass I was using versus the new brass @Rocketmandb sent me... They are the same case volume! I'm getting 96.5 grains of water.
My only guess is I am over pressured with my loads... Except the same load as the new brass I used was sticky.
I hope that makes sense.
I need my brother to throw my data into quick load. The gun and cartridge has so much potential... I'm just not squared away yet.
I don't think we know "The rest of the story" about most of those issues.. I've been chambering it for 12 years now and have had probably 6 different reamers in that time. Each for a specific purpose. No problems that weren't self inflicted. Now it is standardized. The reamer manufactures I use hold tolerances -.0000" + .0005" Those are JGS and Manson. Manson for HSS and JGS for carbide. Very happy with both.
One thing people need to understand about Hornady brass is that you just can't hot rod it. It's perfectly fine if you stay under 65ksi (And I'm not going to say an especially soft lot never makes it through). If you're running on the upper end and something causes a spike (piece of carbon fell down the muzzle from your suppressor/brake and got in the neck area, for example, or carbon builds up in the throat or neck), then the cases exceed the yield strength and plastically deform. Primer pockets open up, sticky bolt, etc... I believe that's largely the problem with the GAP 4s brass they make/made. Some sort of interference between the brass, sizing die, and the chamber that makes pressure spike. I do believe the 1st lot of 4s brass got an over zealous annealing cycle, though.
The other thing could be a die sizing issue. That's as simple as doing a cerosafe mold of the die and micing it out to see if it's doing what it's supposed to. In that event, the BEST thing you can do is let whoever made it know so they are aware and can address it.
All teething problems that happen with anything. Don't buy the first year of production of any vehicle, motor, etc... etc... if you're not willing to accept the risk of some unforseen issues.
The other thing could be a die sizing issue. That's as simple as doing a cerosafe mold of the die and micing it out to see if it's doing what it's supposed to. In that event, the BEST thing you can do is let whoever made it know so they are aware and can address it.
All teething problems that happen with anything. Don't buy the first year of production of any vehicle, motor, etc... etc... if you're not willing to accept the risk of some unforseen issues.
Correct, that's exactly why I made no mention of names on anything related to the issues I have heard of because we don't know the whole story start to finish and just "suspicions" on what may have been causing them. I have a tendency to over-think things sometimes and try and prevent a problem before it starts. Unfortunately is has become part of the process after years of doing this and not doing the proper research beforehand and wasting a lot of money along the way.
Understood
I’ve had good luck with rl26 around 73.8. 26” 1:9 barrel. Got the sticking bolt taken care of today. There was the tiniest ridge in the chamber that needed polishing a bit. Tested 2 loads at the higher end and functions great. Have some h1000 and rl26 loaded up to test maybe tomorrow.
Shot some 212s and 225 factory ammo today. Best was .48 five round group with the 212s. The 225s were between .6 and .7 the whole time. Didn't Chrono anything this evening. Going to just shoot all the factory stuff for now until the Redding type S die shows up next month and go to the 215 Berger's.
Mind sharing the loads you tested? Thanks
Why not just buy a factory 300prc?
AI AXMC
Barrett, Bergara, Proof, and Remington have factory 300PRC and I'm sure others will come along soon enough.
As for those that don't need to be sent off, I'm going to venture with the usual suspects. AI, DTA, Ruger, Savage, maybe Cadex.
As for those that don't need to be sent off, I'm going to venture with the usual suspects. AI, DTA, Ruger, Savage, maybe Cadex.
Proof is spinning up tikka prefits now too. Sure they could do one in 300PRC
Maybe, but given the OAL restrictions presented by the Tikka, I think they'd be hesitant and not do so but I've been wrong before.
Edit: there doesn't appear to be a DBM offering for Tikka's anymore to load past 3.500"
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Ahh not up to speed on the tikkas, haven’t had one yet.
Another option would be a Mausingfield or Nucleus with a shouldered or savage prefit.
Another option would be a Mausingfield or Nucleus with a shouldered or savage prefit.
Bighorn TL3 LA with CIP cut works well also. Proof does 300 PRC sholdered prefits for it too.
H1000 I started at 74g and went up to 77.5 in .5 increments. 77.0 was the winner in that powder so I’ll narrow down from there. I had73.8 in rl26 work really well Monday so narrowed the steps and found 74.0 to give the groups I posted.
Should also mention. 215m primers, necks turned with .002 neck tension and seated to factory length. 26” 1:9 m24 Bartlein barrel. Hope this helps.
I’d love one for my DTA, but I can’t find anyone that will spin one up to my specs. Either they don’t flute barrels, or they won’t do the twist rate I want.
