Chaotik
Gold $$ Contributor
I should clarify.
Nothing has popped yet.
I do have a bunch of primed brass that I've discovered has ~ 1/3 of the primer pockets that the 'no go' side of the primer pocket gauge from 21st Century will go in 1/3 to 1/2 of the way.
The brass is all bumped 2 thousandths from the chamber headspace. The loads I'm using are 52K to 56K [according to GRT].
Before starting to prime this lot I knew the primer pockets were getting looser, but only recently tested a some with the primer pocket gauge. This lot of brass is all primed with Unis Ginex SRP to account for the loosening pockets. But, with the testing I just did [just over 100 unprimed cases], I'm beginning to wonder how many of the primers are going to come out.
Do I have it right that, in an ar15, when the powder is first ignited, the case is forced back against the bolt face, yes? When the bolt starts to open does it retract from the base of the case so that there is room for the primer to be pushed out [assuming there's enough pressure left in the case].?
21st Century sells a primer pocket no go gauge? Interesting.... do you have a link?