January 7, 2017
OfflineStinger said
Firstly, if it is a Model 15-2 then it is in .357 Magnum ... a .22LR is a Model 22 (if blued and 722 if stainless).Most models use a .006" feeler gauge to adjust the barrel to cylinder gap. There is also a .002" tool, but I'm not sure what model(s) use that one. Â
Sorry it's the 22lr. So it sounds like the gaps are consistent from 357 to 22.That answers my question,thanks
Part of the reason for the  .006 gap on a 15-2 is the heat expansion of the cylinder. I suspect that would be less in a 22lr. The other reasons are powder buildup on the cylinder face and the possibility of a less than perpendicular cylinder face. If the cylinder face is true and you wipe the face with a rag every few dozen rounds I believe you could make the gap  .003 or  .004. Take the tool with you when you go shooting  also.Â
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