Quote Originally Posted by Uni-Vibe View Post
This is a known issue with FC headstamp.
Federal does not anneal their case heads as do virtually all other manufacturers and therefore you get primer pocket expansion. Nothing wrong with FC ammo, but I only reload it one time, and then scrap it. I have reloaded some Frontier from one lit with no problems, but I'll watch for loose primer pockets.
I'm not familiar with annealing the case head.

My thoughts are annealing it would make it softer and more prone to head separation and primer pocket expansion.

Can you expand on this?