"You shot in the neighborhood of 350 rounds through an R-9 in a single outing? You are a better man than I."
Oh Man! Yikes. Makes my trigger finger hurt just to think about it.
Now that I consider my Rohrbaugh to be completely reliable, as it has been from the start, I usually start off with a mag or two of Rohrbaugh shooting just for
kicks, and then go to something that is heavier in weight and less demanding on the shooter. If the failures had happened in the later stages of shooting this many rounds, I would have suspected fatigue as a factor, but since it didn't I'm stumped.