I've had a S&W Airweight (317-3) consistently lock up on me. This is a little ol' 22 rimfire.

It turns out that it specifically did not like Wolf Match Target ammo. It would bulge out the base of the case after firing (every single time) and thus lock up the cylinder- having to use a mallet to open the cylinder. Any other ammo that I had used was fine except for that Wolf ammo.

Last edited by alukban; 06/27/17.