I'm new here and was looking for some 10mm powder info and this thread caught my eye. I need to make time to read the whole thing but I did see 9mm mentioned.
I compete using 9mm and reload by the thousands with bulk used brass and always end up with a handful of rounds that won't pass my chamber checker test. When a couple hundred rounds have been accumulated my Lee bulge buster setup is put into action. Since the 9mm case is tapered we use a Lee 9mm Makarov crimp die with the guts removed to work with the Bulge Buster. You can run the setup dry and I have also used a little case lube. The loaded rounds now pass the chamber test and make perfect practice ammo that I have also used in competition.
Sorry if this has already been talked about in this thread.   Denny