Related question, sort of OT: When foreign makers simultaneously make or made 2-1/2 and 2-3/4 inch chambered guns, was there/is there any difference other than the chamber lengths? I am really thinking of high quality pre-war German guns,some of which were 2-1/2 and some of which are 2-3/4. With all their fasteners and bolting etc. these German guns seem strong enough to withstand about anything, but the same goes for English makers who made both chamber lengths at the same time (and particularly after WW II). It seems kind of hard to believe that they would go to the expense of making two totally different types of guns. I am not talking about pigeon or waterfowling guns that are obviously of hardier construction.
