Problems with Bergara HMR 6.5CM

jmccracken1214

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I ran 67 rounds of hornady match 140gr ELD through the rifle with 0 issues.

Started to work up a load for it, started very low with H4350 at 39.8gr, which was 2500fps. Very slow.

Went up to 42 in .2 climbs, blew a primer at 40.4, less than 2600fps. Still slower than the factory ammo. Using hornady brass and Federal LR primers. Shot the rest, no issues. Today, i shot 15 rounds at 41.6gr, 2650 fps, 2 of the 15 blew the primer out and have a smudge/swipe mark on the head stamp.

Any clue? Im not sure if its the regular firing pin issues these rifles are known to have. No cratering of the other primers, brass looks fine. I didnt even have a velocity spike today. Believe it or not, the ones that blew the primers were 2 of the slowest out of the 15, at 2049. Primer pockets on the 3 ive had blow out now are too big to seat a primer back in

Anyone have an idea? Im at a loss.
 
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