I had heard guys say that sticking a pencil in the barrel of an empty gun, pulling the trigger and seeing how high the pencil jumped was a good way to function test a used gun. I'd never done it until today when I put a pencil in my Ruger p95 9mm. I was amazed at how far it shot the pencil out of the barrel. The pencil shoot 3-4 feet up and hit the ceiling! I was just expecting it to jump 1/2 way out the barrel. This experiment reminded me of a post I read a year ago where somebody was saying that a certain ammo had hard primers and that striker fired guns might have some trouble firing these rounds because the firing pin doesn't have as much force as a hammer fired gun. Having had several striker fired and hammer fired autos I thought that this was BS. I never tried the pencil test on either the M&P or Glock I had, but I'm interested if they would have knocked the pencil as high in the air as my Ruger did. Maybe someone could toss a pencil in their barrel and do some experimenting. Do striker fired autos have less firing pin force?