I put 120 rounds through it tonight and on the last 20 4 didn't fire. I waited 30 seconds on each (btw, that can make you sweat) and checked them and there was no mark on the primers. On the first one or two I figured I might have done something wierd like released the trigger too soon (is that even possible? I don't see how but...) but after 3 and especially #4 I dropped it in the shop. So unless it's something clearly wrong with the gun this will be my last Ruger.