I would suggest that it is important to not only take a chamber cast of the cylinder and measure with a micrometer or accurate machinist type calibers but also slug the bore and measure that. A couple of years ago I bought a revolver with a RCMP letter describing it as a 44 russian. Like a fool, I did not slug the bore and when I shot the gun I could not hit a bull in the bum at 10 feet. Back home and slugged the bore; bore was .451 and cylinder was actually 44 russian. The gun is now a 45 Scofield. Point is however, that the gun could just as easily been the reverse numbers; 44 barrel and 45 chamber. Relative to your bore (not groove) diameter of roughly .42 inches, most modern 44 cals use .429 slugs. Allowing for depth of rifling they would have a bore diameter in the .420 range while most 45s would be considerably larger
cheers mooncoon
cheers mooncoon


















































