I had a 971 snap a firing pin. Got it back from Interarms (the importers at the time) and it snapped again the first range trip. I took it to my smith, he said it needed "proper fitting" and never had a problem with it again. I wouldn't sent it back, personally. I'd get a good smith to put it on.
I've heard of two other Rossis and a M13 Smith and Wesson snapping the hammer mounted firing pins, too. My M971, I know, was not abused by dry firing or anything. This is why I don't carry a gun with a hammer mounted firing pin for serious social work. May be paranoia, but when it happens to you, you get a little antsy about it. LOL I prefer the Ruger/Taurus frame mounted inertial firing pin. I have heard of the return spring breaking on 'em, but never seen it happen nor do I know anyone to whom it HAS happened, one of those rumor things.
I'm probably paranoid. Tens of thousands of M10s have ridden in the holsters of police officers, every one of 'em with a hammer mounted firing pin. But, I still prefer the frame mounted ones.