Yes indeed - I think it might have been early on in the discussion of chokes.

My brother's Manton 15 bore (& so marked) with .675" tubes shot donuts with wads punching almost in the centre of the hollow pattern at 25 yards. This was with hard card, then fibre wad, then 1oz. shot, then "B" over shot wad. The hollow patterns plagued us with light loads and heavy loads, but with from 65gr. to 75gr.(2 3/8's to 2 3/4drams) of powder, same shot and wad load, it shot beautiful patterns with both tubes averaging 72% at 26 yards. One load of 3 drams and 1 1/8oz. shot 84% from the right tube, but very weak and patchy, sometimes donuts from the left tube. Trying to find a descent pattern with BOTH tubes was merely trial and error - but we managed. It's possible that using some of the other guys multi "B" wads between the shot and powder might even improve. It would be nice indeed to get 80% at 26 yards from both tubes. Those patterns would give almost 40 yards killing patterns from a cylinder bore - Nice! As-is, we've got a 30 to 35 yard grouse gun- good performance from a cylinder with light shot load.