I'm having the same problem with my 9c, I cleaned the gun today and I'm going to try a different ammo when i go back to the range. I know this gun does like PMC bronze 115gr ammo. My gun jammed every 10 to 15 rounds. I managed to shoot 100 rounds out of it today but got angry and left because of the gun jamming and the slide not locking back after the last round. I know i don't Limp-wrist the gun so i feel like this is a problem with the gun and the ammo. Never had this problem with any of the 16 handguns i have owned. I will try this gun one time, if it jams or the slide don't lock back after the last round, i will clean it and sell it.