Originally Posted by
muzzlestuffer
so guy's there is a possibility of gun going off while closing ? so maybe after setting up it should be checked with just a primer until known safe ?
That's why I was always careful to remove the extra clearance, but not to crush the primer. What you never want to do is switch to a different brand of primer, because they're different lengths. I always stayed with the federal 209a primers. They seemed pretty consistent. Even then i'd check the primers on an empty gun when using a new batch.
If you're worried. You can use the o-rings.