I have been measuring a lot of shotgun bores lately, most relatively modern imports. I have yet to find one with anything close to .729. Most are high teens to .725. Everything else is all over the board. Old English 10 that is spot on .775(which seems kinda rare)...old NIG from same timeish at .750 and .760..wich seems way outta line. Most american doubles spanning between just before both wars seem to be .720-.725.

Best,
Mark



Ms. Raven