FC Posted July 26, 2016 Report Share Posted July 26, 2016 I've got an EMF .45 Colt SAA clone that has .006" end-shake. I've read some on the subject. I think that .003" is the gap limit, or is that just S&W? I'm not sure how to find shims or revolver center pin that would remedy the problem, or if I can even do shims myself? Thoughts? Quote Link to comment Share on other sites More sharing options...
AzRednek Posted July 27, 2016 Report Share Posted July 27, 2016 Tony guess I'm dense as far as to the definition of "end shake". If you mean the gap between cylinder mouth and barrel. I believe .006 is optimum. I'm thinking back when I had a Dan Wesson with removable barrel. The manufacture supplied feeler gauge was .006. According to what I recall in the factory manual or possibly a gun rag. There was no internet back then. Less than .006 might and if I remember "might" was ambiguous. Accuracy might (but might not) improve with a tighter gap but at least .006 was needed to assure the cylinder did not bind up. I recall tightening up the DW's gap to .003 and the cylinder began binding after a short session of shooting home cast and lubed handloads. I recall a friend tightening his up to .004. He claimed no binding problems as long as he shot jacketed factory ammo. Best I recall, I did not see an accuracy improvement with the gap less than .006. Your 45's mileage may vary from my experience but .a 006 gap is fine with me. Quote Link to comment Share on other sites More sharing options...
wiley Posted July 27, 2016 Report Share Posted July 27, 2016 There is a base pin bushing that fits into the front of the cylinder. It can be a slip fit or pressed in. It controls forward movement of the cylinder or end shake. .006" gap is usually considered nominal as mentioned above. Quote Link to comment Share on other sites More sharing options...
FC Posted July 28, 2016 Author Report Share Posted July 28, 2016 Wiley, I wonder where to get those? AZ, from what I've read it is back and forth cylinder movement. Battering over time from firing makes it worse. http://www.grantcunningham.com/2007/01/the-importance-of-endshake/ http://www.coltforum.com/forums/single-action-army/67827-how-fix-cylinder-play-2.html I see that 3/1000 is supposed to be the limit, as measured between the cylinder and the forcing cone. Quote Link to comment Share on other sites More sharing options...
FC Posted July 28, 2016 Author Report Share Posted July 28, 2016 Brownells has Colt end-shake bearings. Now I need to find a video for installation. Quote Link to comment Share on other sites More sharing options...
wiley Posted July 28, 2016 Report Share Posted July 28, 2016 Not sure if this is your model, but a good place to start: http://www.emf-company .com/store/pc/1873-GWII-Non-Transfer-Bar-Models-c510.htm Quote Link to comment Share on other sites More sharing options...
FC Posted July 29, 2016 Author Report Share Posted July 29, 2016 Thank you. I can't that great of instructions on replacing the bushing, and might have to take it in for repair. It would see the bushing should be in the rear so it would push the cylinder toward the barrel, but the bushing looks just the opposite, like it would push the cylinder back toward the hammer. Quote Link to comment Share on other sites More sharing options...
wiley Posted July 29, 2016 Report Share Posted July 29, 2016 Part of the bushing purpose is to set head space for the chamber. It also has to prevent the gap from closing between front of cylinder and barrel forcing cone. During recoil the cylinder wants to move forward and the bushing is a solid stop against that. The back has to be open for the cylinder ratchet to be engaged by the hand. I believe the bushing is a slip fit on the EMF, maybe a little Kroil would persuade it? Quote Link to comment Share on other sites More sharing options...
FC Posted July 30, 2016 Author Report Share Posted July 30, 2016 Good thought. I ordered some bushings. Thanks. Quote Link to comment Share on other sites More sharing options...
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