While we don't have the numbers here the 15-22 has a good following in our IDPA based 3-gun matches. Personally I have fired thousands of rounds through my 15-22 and I've seen others do the same. I had one OOB (suspected) but have had zero issues besides. A couple of FTF, FTE and some duds, but not much more than expected from a rimfire, and less than some of the 10/22s I've competed against.

With the numbers of 15-22s in the US surely if this was a real problem they would be experienced lefr right and center, not at one or two select Appleseed events, where people of questionable skill have done on-range gunsmithing?