Shot some 22 Shorts in my 1966 Model 17 and they shot well but I then loaded some long rifle and the were hard to chamber and after I shot them had a very hard time ejecting the spent rounds. My guess is that the chambers are a very tight tolerence and the ring made by the shorts in the cylinder caused this. The cylinder is now soaking in Hoppes and will scrub out with a bronze brush tomorrow. Used to do this with my Ruger Single Six wih no problem but I think it had some loose chambers. Live and learn.