My 2" gun was not proofed that high. It was fun to shoot with 7/8 ounce or 15/16 if you needed a few extra pellets. I would not want to shoot 1 1/8 ounce loads in it. Light as a feather, anything over 7/8-15/16 would be like shooting a 3" 20 gun. Possible but not fun at all.
I think some of the Spanish guns were chambered for 2" when the barrels were the same as 2 1/2" except being short chambered. So you ended up with a 2" 6 pound plus 12 gauge. Not a true 2" at all. I don't remember my 2" exact weight but near five pounds. I sold it because it was really just a 20 or 28 gauge gun for all intent and purposes.
Those 2" shells were cute little things. Do be aware a number of people report shooting 2" shells in longer chambers resulted in clumping of the shot with some bad results in guns. Near as I could understand they thought gas got past the shot before it entered the forcing cone and cause it to become almost a oversized slug instead of a column of shot.
