Ran 300 rounds between my 10/22 and 22/45. Had 3 non fires. They wouldn't even fire after rotating the strike spot. No under powered rounds. No jams or stove pipes. For 17 bucks for 500 rounds i can live with a 1% failure rate. Accuracy was good. And boy they are fast. A can hardly moves when you shoot them. They have nice splatter marks on steel too.