I actually just bought one of these for my G19 last week. Took it to the range and shot fed auto mach, remington golden bullets, target, hollow point both lead and copper, winchester and they all fired fine. I did have 1 hiccup on the copper hollow points by remington and it stove piped but I think it was a fluke. I shot about 400 rounds in sitting and all was well. The only thing that annoyed me were the sights. The sights on mine are unable to adjust enough for how high I was shooting. Granted only 15m but It was shooting about 3in high...