I purchased this gun back in June of 2003. Everythings been going great up until this last weekend. I have 400 rounds through the gun to date and this weekend I decided to try out fiocchi ammunition. Two separate rounds at separate times failed to fire. The firing pin just went click. I pulled out the round, strike was in the center but very light. I just reinserted it and fired it but I just need to know if this is a very common problem??? Probably just a hard primer. It happened to me back in 1992 on an ancient glock 21 also so I was just wondering if it's happened to anyone else. Need input!!!!!!!!!! I already stripped the slide and checked everything so I know it's still going strong.