I had a federal mis-fire one morning, I did manage to reload and kill the bird though, after I got back to the truck I examined the shell and the primer was seated to deep, the firing pin just barely nicked it. I still have the gun and it has never done that again, it was a new shell and I have never saw one like that before. I always check my ammo now, that almost cost me a 23 1/2 pounder.