I was out shooting some blank 12 ga ammo I made using corn meal instead of lead shot. I shot 4 of the 5 without a problem until trying to pull the trigger on the 5th round. Nothing happened, not even a click. I ejected the round, tried to dry fire it and nothing. I need some help analyzing what could be wrong. I know, stupid move but I was testing some rounds to shoot out of my cannon that is also a 12 gauge. Could the firing pin be busted? Could the corn meal have come back and gunked up the trigger and firing pin? Gosh, this shotgun has been with me since my 16th birthday and I'm 48 now. It is in almost mint condition. Any suggestions other than, way to go dummy will be greatly appreciated. Thanks.