How exactly was it determined that the blade it opened? YOu might point out to your buddy that happens about once in every 20,000 shots. If it is correct it would be the first time I ever heard of it. I have heard a bunch of people say they didn't open until they put a piece of paper or something up that verifies that they did infact open. I have also heard so companies recommend adding rubber bands when you get into the 280 fps range but still never actually heard of one not opening.