No scopes though...please.
Last week my neighbor brought over an antique percussion English fowler and wanted the missing tang screw replaced. The fowler had one key but not a hooked breech. Under the tang was a flat bottom 5/16" dia. blind hole, 7/8" deep that had remants of threads. Evidently an exterior threaded insert w/ a threaded hole was used to screw the tang down. How common was this setup in lieu of a hooked breech?.....Fred