I have heard that these don't really work in 9mms. I have carried them for snake loads alternating with Speer GDs, but never shot them before. Tried them at the range yesterday. Well, you can fire once and then have to do a clearance drill cause the round is so light, it doesn't have enough to cycle the slide. I have heard before of the BBs falling inside the gun from others. With a XD Sc 9mm, I haven't had that happen, the BBs would hit the target but the very light casing wouldn't extract. I didn't even bother trying the .22lr ones with my P22. I figure that would be a waste.