I have a little 44-page booklet, titled "The History of W & C Scott Gunmakers. This was written in 1983 by Patrick G Whatley & John A Crawford.

12 gauge pigeon guns are listed as weighing from 7 to 8 lbs with barrels of 27" to 30", Half or Full chokes. These "Usually" had 2 3/4" chambers & handled up to 1 oz shot. Options included a Half-Pistol hand, cheekpiece, Monte-Carlo stock, Silver's recoil pad & Side-clips.

Wildfowl guns were made in 8, 10 & 12 gauges with barrels of from 28" to 36" but are not listed gauge specific. Chambers were 2 3/4" or longer & in 12 gauge used 1 oz of shot.

Heavy Wildfowl guns in 12 gauge weighed 9 lbs or more & handled up to 1 oz of shot.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra