I have a 625-6 4" Mountain Gun in .45 ACP and I'm hoping that someone with experience on this revolver can suggest what alloy/harness might shoot best. For years I have cast boolits for my .45 autos hard following the "guidance" of "experts" that the shallow rifling of these pistols requires a hard cast boolit to ensure that it doesn't skip over the rifling or some such theory.
My question is what should be a reasonable boolit for the S&W? I normally cast boolits such as the Lee 230 grain truncated cone or the Lee 255 RNFP sized to .452 of water dropped WW. These are loaded close to reloading manual max velocity as the revolver is carried as a field gun rather than a target or gaming piece. The gun's condition is very good and rifling is pristine. All comments will be appreciated. GF