I had a SAMMI minimum chamber EMP for a while and it would jam up on any brass over .3915 near the base. So I bought a Wilson case gauge, and started scrapping all sized cases that would not enter it and fall out from its own weight (.391 or less near the base). I would lose 10/15% of range brass on a new batch. After that, if I did not load them too hot, they would continue to pass the gauge after sizing.The 9MM case is tapered, so it is important the sizer is all the way down when actually sizing a case, to take into account press flex.
My old one I gave my son.
The new one I bought.
No issues with loaded rounds passing the gauge using brass that passed prior to loading.
An FC case that failed the gauge after sizing. Some would fail worse than that,
but some would go all the way in, but need a gentle poke to get them out, which is a failure.
My old one I gave my son.
The new one I bought.
No issues with loaded rounds passing the gauge using brass that passed prior to loading.
An FC case that failed the gauge after sizing. Some would fail worse than that,
but some would go all the way in, but need a gentle poke to get them out, which is a failure.