So ma
So maybe with a slightly longer barrel it’s possible with no pressure… I thought RCC was done for …
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As always you’ll have to test and load develop in your own rifle to determine what’s safe, I’m just pointing out 3100fps with a 180gr bullet is definitely on the upper limits of this cartridge.
Yes I was lucky enough to receive my RCC brass, I know a cpl chaps not so lucky before they closed up, they took their money and that’s the last they heard from them.
On black Friday I ordered two prefit PVA Osprey barrels. They are 1.20" full straight contour and 26" length. They are going to get cut to 18" and 20" and get LRI Murder Hornet fluting. I will running suppressed.
I was able to pick up two boxes of factory match ammo. I'll have 20 once fired pieces of brass for each barrel to reload.
Primers I have cci200, cci250, fed 215, fed GMM215, fed gmm210, Winchester wlr, Winchester wlrm.
Bullets I have Hornady 162gr eldm, Berger 175gr eh, Berger 180gr vld.
Powder I have H1000, Retumbo, H4831sc, 7828ssc, n555, n565, n568, n570
Now ADG just needs to make brass.
I was able to pick up two boxes of factory match ammo. I'll have 20 once fired pieces of brass for each barrel to reload.
Primers I have cci200, cci250, fed 215, fed GMM215, fed gmm210, Winchester wlr, Winchester wlrm.
Bullets I have Hornady 162gr eldm, Berger 175gr eh, Berger 180gr vld.
Powder I have H1000, Retumbo, H4831sc, 7828ssc, n555, n565, n568, n570
Now ADG just needs to make brass.
Originally the first loads I tested I was only getting 3050fps at the 66.5gr load but last time out it’s settled at 3100fps, I’m at a little over 200 rounds on the barrel.
I have some factory 175gr ELDX ammo to try out as well.
Is N570 expected to work well in the 18” barrel? I figured it would be too slow. I ask because I have an 18” carbonsix on the way and pile of N570. I was planning on using H1000.
Received them 5 days after i made that post, all parts at smith waiting machine work, assembly, cerakote and bedding.
I would choose a fast powder in a 18 inch. I have good luck w N570 in my 7 MAX w 26 inch barrel.
Not sure if this has been posted yet or not. Probably worth a look...
ETA: For those that are visual learners.
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I'll see if I can track down some rl23. I'm not chasing speed just looking for single digit SD and ES. Accurate
Those are just suggestions and hornadys findings with a 24” barrel. All rifles are different
Yeah. Suggestions generated by calibrated pressure and velocity test barrels. Velocity isn't free. 20-30fps per inch of barrel length. The rest of the delta is almost directly related to differences in peak pressure.
Reloading for 7 PRC - Hawkins Precision
Reloading 7 PRC - Learn how six different powders work in Hornady's new 7 PRC. Powders include H1000, N565, H4831SC, RL23, and Retumbo.
hawkinsprecision.com
That dude went on average about 3 grains over max on each test.Reloading for 7 PRC - Hawkins Precision
Reloading 7 PRC - Learn how six different powders work in Hornady's new 7 PRC. Powders include H1000, N565, H4831SC, RL23, and Retumbo.
I'll be interested to see your velocities, I'm back and forth on 18" vs 20" for a light-ish suppressed 7 PRC hunting build. Kind of leaning 20" now for a smidge less blast in case I'm traveling for a hunt and have to leave the can behind.
I'll keep everyone posted. My can is still in jail so I'll be playing with them braked until it's free. My can is also 9" long so that's one of the reasons for the 18".
The question is whether or not to play with them while full length before sending off for cutting and fluting?
Not to mention there are so many factors that can affect a persons fps besides powder.
I tried telling the guy everyone’s rifle is going to be different with where they show pressure.
I’ll look at my .308 load data when I get home I know for a fact that over what berger suggested max is….
All barrels are different, bore diameters from one manufacturer to the next can vary, reamer specs and FB can vary, brass, powder and primers can vary from lot to lot,,, all effecting pressure!
THIS IS WHY WE WORK UP
THIS IS WHY WE WORK UP
I use a lot of N570... great powder. Going to need a long drop tube or vibrating tooth brush w N570 large kernels to get a compressed load. I posted a pic of N570 in RCC 7 PRC brass next to my 7MAX w N570. See post #164
I’ve had a dozen 6.5 PRC’s using Hornady, ADG, Lapua, Bertram
Ten 300 PRC’s using Hornady, ADG, Lapua brass
I have over 250 rounds through my 7prc RCC brass and 20 rounds of factory rounds through the latest 7 PRC
All rifles built using SAAMI spec reamers and never had an issue.
Lol I asked both the gunsmiths I use and neither one has had any issues or complaints with PRC cartridges with all the rifles they’ve built, one of the gunsmiths had clickers in his own 300 WSM after 4 firings on the same brass, he said he corrected it with a body die !
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