I have a Hornady hand primer and it has never really worked out for me. I find either the primer doesn't fully enter the chamber causing it to catch as I try to seat it or the brass moves a little and it won't seat or maybe the primer flips over somehow. I dunno, just haven't been thrilled with hand priming. Plus, if I were to catch a partially inserted primer while squeezing the handle and have it go off, I'm thinking there are going to be a number of other primers very close by in the tray when that happens. I'm not so much worried for myself, but I have a dog that sticks to me like glue when I'm home. A kaboom at the reloading bench and he'd never help me reload again in his life. The Lee Safety Prime seems about the safest method ever thought up. I find priming as the ram goes down from belling the case mouth is the way that works for me.