I'm working on a problem that comes and goes on a RG revolver 22 cal. short. After cocking and fireing when I let off of the trigger I notice the cylinder moves just enough in the wrong direction to not allow the cylinder to advance to the next position to fire. This has been causing a missfire from time to time .I've disassembled and cleaned the entire works and still have this problem.Can anyone lend some advice on what to look for. Thanks,SMOKEY63