All S&W barrels use 36 to the inch threads of various diameters. One turn gets you .02777. Call it .0278. So it is only ever one turn which in this case would make the extension about .0158 to long so you would then trim barrel extension about .012 to .014 in this case to get the correct gap and then trim the tip of ejector rod and center pin o it functions correctly. Maybe freshen the forcing cone a bit depending on how itt checks out.
Cylinder shims will not close up the barrel to cylinder gap. They get rid of end shake by holding the cylinder tighter to the rear.
Last edited by steelslaver; 09-17-2020 at 07:03 AM.
|