Thread: Resizing inconsistency - Am I missing something

I'm like you and can't help but to measure all cases Though the more I'm loading the less I'm measuring these days as I just don't need that perfection for my intended level of shooting. 900m steel, 600m deer and up to 300m headshots on meat animals if carrying out whole(conditions permitting) .
I found the same thing as you with the shoulder bump varying slightly. The main causes for me where not cleaning the die out if sizing dirty brass while using Imperial sizing die wax, not lubing the inside & outside of case neck enough (standard F/L dies and graphite) and the biggest issue was not annealing. I also double run in the F/L die to get a more consistent sizing, Probably because of the button expander, 2nd stroke up just feels smoother too.
I anneal every firing with a gas torch and twirl the case by hand for 4-5 seconds and put it down fast! Might not be amp annealer accurate but bloody makes a difference to the brass sizing consistency (never have to readjust dies either) and case life.