I have a Smith 325 revolver and have had it for several years. I shot some stout factory ammo through it from time to time and have noticed the cylinder is binding somewhat on rotation--I`ve disassembled the gun, lubed it, cleaned it, etc. Alignment and timing look OK; and the cylinder crane when removed from the gun looks OK as well--flash gap is OK as the cylinder rotates and I don`t see other issues--ejector pin is straight, etc. It still fires OK but the binding hurts the trigger pull.
After examining it I think I could likely solve the problem by some light hand sanding of the cylinder pin--the cylinder will rotate ok when partially mounted but hits some binding when the pin is fully in the cylinder. Any ideas ?
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TXplt: I don't think it's a pin or yoke problem. From what I have read in your narrative, I think it is likely that the cylinder hand has pushed up a burr in one or two notches of the extractor star. Use a marker that will wipe off and number the chambers on the outside of the cylinder. Work the action with fired brass loaded. Note where in the circulation the roughness occurs. See where that occurs and then examine the hand notches for that chamber(s). I bet you find some anomaly there. I would pull the ejector pin out of the cylinder and roll it around on a known flat surface to double check that it is straight. ........... Big Cholla
Sw 325 
