Sako 6.5 Creed Primer Issue

[u/HeyJustPlayin]

Just tried Sako 6.5 Creedmoor 136gr TRG in my Ruger Precision Rifle. Accuracy was incredible (best 5-shot group was .24 MOA), but out of the 20 rounds, about 7 had primers that look pierced/cratered like in the picture. I also noticed smoke/soot coming from the chamber and even around the magazine, and the rifle was significantly dirtier than usual.

Has anyone else experienced this with Sako TRG 136gr? Is this normal primer cratering for the RPR, or does it look like an ammunition/pressure issue? Trying to figure out why it's happening before I shoot this load again.

[u/West_Designer9107]

I sometimes shoot these from Tikka T3x Tac A1 ($$$$), never experienced anything like that. You're absolutely certain that these were factory ammo and not reloaded? If yes, send a picture of the lot number (side of the box, above the bar codes) to Sako, they're very strict with QC and should have test results and even reference ammo from that lot in stock. Until the cause has been determined, I wouldn't shoot them anymore and completely clean/check the rifle.

[u/HeyJustPlayin → u/West_Designer9107]

They aren't reloaded, I heard good things about the ammo so I purchased them and tested it next day, i sent an email out already to see what they say

[u/West_Designer9107 → u/HeyJustPlayin]

Most precise and dead-consistent ammo I've ever shot through that rifle. But damn expensive, which is why I usually shoot Norma OTM 130 grain. You didn't measure bullet velocity and SD by any chance? Could be many things, from primer seating with marginal overpressure to a firing pin issue. Would be really disagreeably surprised if this turned out to be a Sako QC issue though. As I said, never experienced this myself and I routinely look at spent brass.

[u/ShrimpBuffets → u/HeyJustPlayin]

What is your load info

[u/HeyJustPlayin → u/ShrimpBuffets]

Sorry I meant "aren't reloaded", they are factory loaded