I had a two incher many years ago. Mostly it was my closet queen. Rarely shot it because I did not hunt many small birds and ducks and geese were just too large for it. Both barrels were choked improved modified and the gun was within an ounce of five pounds. Would have been a fine gun to carry up hill and dale chasing birds if I had any birds to chase.
My confusion about 15/16 may be on my end. I loaded 13/16 shot in Federal Paper hulls I cut down. 13/16 fit perfectly with felt and card wads. they patterned well and dispatched quail with authority. I had no way to measure the shot string and my wife refuses to tow a pattern plate behind her car so I could test it but I always felt that it hit like a flyswatter. And those short paper reloads were just about the cutest shells. Roll crimped or with a folded crimp both worked well. Nothing like the smell of paper hulls with fresh spent smoke coming out of them.