Posted by David Willliamson on February 19, 2022, 6:47 am, in reply to "Re: 2 3/4” Chambers"
I have a 1039 16 ga. Field Grade with the optional raised rib. After this period when they changed to 2 3/4" chambers they stamped the barrels water table stating this. The same with the 20 gauge. The bores on the 16 gauge also changed sometime in the early thirties from .660 to the now .662