Originally Posted by swsig

The fact that Mini-Mags sometimes fail to eject is a cause for concern, because I (along with many .22lr shooters) have found them to be the most reliable of .22lr rounds. However, there is one last-ditch remedy you can try before sending your .22 compact back to S&W. Some new semi-autos are "tight", and need to be broken in with high-powered ammo before they loosen up enough to work with regular ammo. I recommend getting some CCI Stingers and/or CCI Velocitors and running a couple of hundred of them through your gun. These are high velocity .22s, and if they don't make your gun run better, then you'll need to send it back. Good Luck!