I have decapped lots of live primers [not crimped]. Easier to just pull the pin and size it. You could stuff the empty primed case into the gun and fire it. Carefully, rifle primers put out a significant blast.
Get a cheap chinese venier scale [looks like a monkey wrench with a dial] and check the length of sized cases. A cheaper way to check length is to make a gague out of a piece of sheet metal. Always wear your glasses, and don't reload any drunker than you would while driving.
Get a cheap chinese venier scale [looks like a monkey wrench with a dial] and check the length of sized cases. A cheaper way to check length is to make a gague out of a piece of sheet metal. Always wear your glasses, and don't reload any drunker than you would while driving.