After about thirty rounds, I had a problem. The action locked up so that I couldn't move the hammer, and therefore, couldn't move the cylinder. It was totally frozen. I suspected a round had not fully seated in the chamber and was getting caught, so I pointed the gun downward and slapped the cylinder with my hand a half dozen times until it finally freed up. No problems after that.
When I got home and broke it down to clean it, I realized the cylinder has counter sunk chambers for the rim of the 22s to drop into so that the cartridges become flush with the surface of the cylinder. Apparently one of them didn't drop all the way in and that caused the problem. Now that I'm aware of it, I'll be certain to pay close attention.
