I don't think you are really in to collecting if you haven't made potentially hazardous mistakes, some just make the most grave of mistakes.
Used to pop off shotgun 209 primers when we were kids using a hammer and steel block. Still have a couple of chunks embedded in my knees. Another time I had an M60 fuze igniter I found in the Az desert at an old base. Put a 209 primer in it, reset it and pulled the plunger. Sitting in the sun for many many years left it a bit brittle. Still ever thankful that I have all my fingers and hand, man did that HURT!