I just recently deprimed a bunch of live SR primers with my decapping die. Wore safety glasses and went slow and smooth. None detonated, but even if one did I dont think it would have been a big deal.
I would advise against doing it with your sizing die however, because there would be nowhere for the pressure to escape if one did go off.
I would advise against doing it with your sizing die however, because there would be nowhere for the pressure to escape if one did go off.