With the coming of swing-out cylinder revolvers both equally S&W and Colt would chamber the .38 S&W, on the other hand Colt labeled “their” cartridge the .38 Colt New Police. The softer alloys used will direct the bore if shot above 900 fps. Very long known simple fact. “Difficult Solid” https://thomasl097gpy3.madmouseblog.com/profile