For ShotgunJones and anyone else interested.......
I just spoke with Glen Jensen, Browning Historian, Browning Technical Assistance, Arnold, Missouri....
The 12 gauge and the 16 gauge standard and Sweet 16 are the same frame size castings at F.N......the 20 gauge frame size is smaller and stand alone in dimension.......
The internal milling and machining will differ, depending on Mag 12 or Standard, Mag 20 or Standard....the barrel dimensions will differ as will wood, effecting weight obviously, but the frame exterior dimensions are as noted above, as per Browning Technical Department....
Glen Jensen, Browning Technical Historian, Drawings and Diagrams - 1-800-322-4626
Browning Technical Service Department
3005 Arnold-Tenbrook Road
Arnold, Missouri 63010
