I was irritated because when Stryker first displayed the pistol in it's case we saw the revolver and 6 rounds. However, when he attacks Logan he fires like 9 shots without reloading.
I counted 5 shots, with one left in the gun when he doesn't shoot himself and throws it away.
I get the rifling problem, but that's a pretty small error in the grand scheme of the movie. Did you notice the guy who killed about 300 bad guys with pistols? Or the guy who shot lasers out of his eyes?
