It seems to me that my luck with buying things is just getting worse and worse, I bought the SD9 about two weeks ago on a private sale and went to test it out. First rounds I ran through it were some rather old looking Wolf steel cased, and I only had two or three rounds that failed to go off, I figured it was the ammo itself so i moved onto the Fiocchi that was brand new and that worked perfectly fine. So I go out today with some Winchester ammo and I still had some Wolf and some Fiocchi left over. I think I counted 20 rounds out of 50-60 that failed to fire, all of which failed had what looked like a very light firing pin strike on the primers. This got me seeing some red because this is my concealed carry pistol. So I am just wondering if any SD9 or SD40 owners out there had the same problems and what steps they took to fix this problem. Thank you for your replies.