I have an AT large firing pin and shoot SRP brass in 6.5 Creedmoor and 6.5x47L and have never pierced a primer. I think CCI primers have a thicker cup which helps I'm sure. I haven't tried federal small primers yet.
Seems like most have issues. My recommendation is to send it to Longrifles inc. and get it bushed. I need to send one to him this summer when my work situation is better.
Yeah. I had 50 pieces of win brass already nk turned, flash hole debuted, primer pockets uniformed. I wasnt going to throw them away with just 2 firings, lol. When they crap out, I got a blue box of brass for it...