I can't remember the last time it happened to me, but it dosen't happen often.
Usually it's caused by an ejector rod that backs out after extended firing, or if you're shooting reloads, a primer that isn't seated all the way will jam against the breechface and halt cylinder rotation.
Usually it's caused by an ejector rod that backs out after extended firing, or if you're shooting reloads, a primer that isn't seated all the way will jam against the breechface and halt cylinder rotation.