Thread: What in the world?

Originally Posted by Tikka7mm08

Defo head seperation. And if new brass it is possible was run through FL die first. If the shoulders are bumped back beyond 0.010-0.020 then the brass can find it has too far to stretch when fired...leading to this problem. I'd check the amount of shoulder bump of a FL sized case.

That was my thoughts too and could be even be a many times fired case accidentally mixed up with the new cases.