I agree with the opinions already here. Why don't you fire a primer in an empty case and compare that to primers from real fired cases. You might have one heck of a firing pin spring! I don't get excited until the outside radius of the primer gets smaller. As pressure increases, the primer will flow and the outside radius will get smaller and smaller. Eventually, the primer will squish to take up all the available space. That happens right before the bolt goes through your eye socket. But in all honesty you're nowhere close to that.
Also, make sure your chamber is absolutely dry when you're shooting, and make sure you get absolutely all of the Case lube off your cases. All I have to do to scare the heck out of myself is to leave Case lube on one cartridge. The bolt will be hard to raise and the brass will flow slightly into the ejector hole because the case cannot grip the chamber like it should when the gun fires.
I explained what was happening to Sierra customer support. They said, " yeah that happens if your chamber or cartridge is oily. Don't do that".
