Just Google it.
Hi fellows,
The Routledge bore is named, not surprisingly, after a gentleman named Routledge. He invented, in the 1930s, a way of machining a shotgun bore in a .22 rifle that resulted in an improvement in the shot patterning over that of the conventional .22 shotgun straight through boring. Schwing's Volume II book on the Model 61 and 62 goes into some detail on this subject. A sport using .22 caliber shotguns to shoot miniature clay targets called "Mos-Quit-O" was very popular in the late 1930s to early 1940s. The Routledge bore was developed during this time period. Guns having this bore are today considered very collectible and are much sought after.
