I have a 649 1 chamber is good round slide in and out fine 2 have to be pushed out with a wood dowel. and 2 have to be taped out with dowel .I have cleaned it with several different cleaners, a brass 38 cal. brush. when its clean the rounds slide in hard 2 have to be pushed in with thumb to seat. they will eject .but once you shoot them they go back to sticking. I don't know. If I should. tack it to a local gunsmith .Send it back to S&W. or try to clean it up .any suggestions'