For me the points made by several posters about weight of barrels is really important. I have two 12X65 hammer doubles stocked same, same patterns and POI, same 75 cm barrels, same weight for everything except barrels. One gun has barrels a bit more than 0,75 lb heavier than other (one gun weighs 7,0 lbs other 6,17 lbs). At trap, mounted or unmounted gun, I shoot about same 20-25 hits per 25 birds, with usually a bird or three more with lighter gun if starting with unmounted gun. On fast crossing birds, starting with unmounted gun, I hit many more with lighter gun. I almost never hunt or shoot SC with heavier gun any longer.

Niklas