Cheezie
Active Member
What causes loose primer pockets? I've had the occur on 25-06AI brass after only 2-3 uses. (I neck-size only after fire-forming.)
Real world 6.5cm vs prc
- Thread starter Threejs
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Rl26 is your need for more speed with thr 156. I was using lapua SRP brass in a 24" Tikka superlite(LONG freebore) with the 156 seated 90k off lands I never hit pressure till 47.8gr which was 2816fps. 47.6gr had a faint ejector shadow @ 2807fps.
DoneNOut
Well-Known Member
It means one is right on that cusp of high pressure and the pocket is growing bigger. It's never been dangerous, you just don't get as much life from your brass. I notice it on my 300WM at third firing. If I can get 4 loadings from one piece of brass I'm happy. Trying to shoot loose primer pocket brass will start to fire etch the bolt face.
I no longer use R26 after using it every cartridge I own for two years. I don't like the pressure I see when it gets hot.
Over pressure expanding the brass in the case head loosening up the pocket.
It can go from no pressure to big pressure in the heat no doubt. Beings I'm 50 miles from Canada in the mountains we only have handful of days late summer above mid 80s.
2700???? 41.7 of H4350 gives me 2790 in a 24" and this is my accuracy node not at all top end. Shooting in the .2-.3
ripzip
Well-Known Member
Just from my short experience with my PRC. 26" Proof barrel 3130 with 153 bergers and Retumbo 59.5 gr. No pressure signs
I shoot the 144 Bergers just under 3k FPS with a very mild load of H4831SC out of 22" Proof 7.5 twist. Do we know the twist rate of the OPs barrel?
I may have made a mistake. I got a 8twist barrel
Not really. You can probably shoot into the lighter 150's. Check bullets you're considering. You wouldn't be able to shoot the 131 Hammer. I think you'll be fine with most cup and core type bullets, Berger, Hornady, etc….
BrentM
Well-Known Member
My proof is 7.5 and my xcaliber is 8. I've shot the 156 to 1500 in that 8 twist and zero issue. It was dead on for bc and velocity off my lab. I have new steel for our range that will go to 1550 next spring. I'll be able to drill into bc truing more in depth if needed but right now I have zero with the 8 twist barrel.
The op is asking about factory ammo and everyong is spouting off about what you can do with reloads. Has anyone compared the FACTORY Hornady 147s in both calibers with similar barrel lengths.
I don't own a PRC, just 18" and 28" Creedmoor barrels. I have never shot factory Hornday ammo, so I can give the OP an honest opinion.
Rant over
BrentM
Well-Known Member
His original post said nothing about factory ammo at all.
