I just got back from the range. I put 250 rounds through my Glock 27. Eight of them failed to fire. I reloaded every one of them that didn't fire and they shot fine the second time. I was using Remington UMC. On a lighter note I put 200 rounds through my USP. I love that gun and the hogue grips make it perfect. I'm coming up on the 2000 mark with no malfunctions . The last time I went to the range I put 500 rounds of Remington UMC through it and had no problems. The time before that I put 750 rounds of UMC through it with no problems. I have trouble blaming the ammo for a pussy ass Glock striker.