I was cleaning my Shadow last night, and discovered that firing pin spring is broken. I'm pretty sure I ran it like this in my last match, maybe even a few. Obviously, I am going to replace the spring, but here's the question: other than being able to ignite 100% of primers (I use Federal), is there a 'ballpark' test one can do instead of burning through hundreds of rounds of ammo? Sometime ago, a gunsmith showed me a 'pencil test': shoot a pencil straight up from a cocked hammer position. What