Quote Originally Posted by opngrnd View Post
I tried not using the expander ball with the M die in the next station. It ended up leaving the case mouths balled inwards which would shave brass. I can't seem to find a RCBS expander neck die in stock anywhere.
I think I'll try not using the M die after the Dillon size/trim. Deburring them by hand seems like a good way to inspect the neck for cracks anyway. Hopefully deburring will be enough to keep from shaving copper.