I recently bought a NIB Mdl 60LS. On first range trip, after 20 rounds of .357, the cylinder, latch, hammer, etc., bound up. I have checked the usual - bent ejector rod, loose ejector rod, debris under ejector star, etc., and all are good. It has virtually zero cylinder shake and a rough/tight .008 bbl/cyl gap. Can I file out the gap to a .010 (EZ Lap Diamond), or just send it back to S&W? Maybe it just needs a new cylinder that will have some shake? This has to be a common problem with these guns because this cylinder doesn't have much meat on the bone. Any help is appreciated. Thanks.