Good point, HiPower.
Dillon addresses the pierced primers with their new style de-capper.
It has a spring loaded de-cap stem, that will jar lose the primer should you pierce one.
When I buy used brass/or free range pick up, I sort into 3 classes:
1. Commercial brass
2. Military boxer primed brass
3. Berdan primed brass
#'s 1+2 get put away for future loading.
#3 gets put (usually) into the scrap bucket-to be sold by the lb.
MilSurp-Boxer primed brass is usually of good quality and has many load cycles left in them.
IMO, Berdan primed brass is more reusable for key chains/writing pens!! HA HA...