About 600 rounds through my RAMI .40 alloy version.
It's handled PMC, WWB, Blazer Brass, Wolf, Gold Dot, Hornady, etc. and have only had one failure to cycle and that was the first time I shot the pistol and when the springs were still brand new and I think I limp-wristed it.
I've not had one hiccup in the last 500 rounds. I love this gun and shoot about 100 rounds through it everytime I go to the range. Was hitting targets at 100 feet away tonight in controlled fire! This puppy is accurate!