Originally Posted by
lightman
I just finished resizing a medium flat rate box of 40 S&W brass. There were a few Win and Federal "NT" headstamps in the bunch. When I resized them there was enough difference in the resistance on the press handle that I knew when I grabbed one of these. I also thought the depriming pin was punching through the primer and leaving the shell in the primer pocket. Closer inspection showed that the primers in these were actually smaller than the standard size small pistol primer.
Another reason to sort by headstamp, I guess. Has anyone else noticed this?