I tried it on my new Winchesteer brass and just broke the sharp edge of the primer pocket, "dilemma" vanished. The dude that answered the phone knew precisely what was going on, in advance of I even reported what primer was being used. Regular pistol primers will begin to flatten https://federal-ar-primers94026.blogsuperapp.com/32377075/examine-this-report-on-federal-gm150m-primers