Since we're on to gun weight, this might be of interest

In 1886 the lightest 10g offered by L.C. Smith Maker was 8 1/2#



At the Riverton Handicap March 8, 1895 only one of the 15 competitors used an American made gun.
“It may be interesting to some to note the guns and loads used, and we give it below. It was a lamentable fact that of the 15 guns used only one American make was represented. This was a special pigeon gun of the Parker Brothers' manufacture, and was a beautiful weapon in every way, and was owned by Mr. Post, whose score of 93 on a hard lot of birds did not show that the shooting power was lacking.”
All the guns were 12 gauge, and it was noticeable that not a full pistol-grip stock was among the number, and most of them were the straight-grip ‘pigeon gun’ model, nine being of this description, and six of the half-grip style. All were of the hammerless pattern excepting two; Mr. Welch and Mr. Robbing using hammer guns.”
Following is the make of guns and loads used:
Capt. A.W. Money - Greener, 7 1/2 pounds.
George Work - Purdey, 7 1/2 pounds.
Post - Parker pigeon gun (AAH introduced in 1894)), 7 11-16 pounds.
Jim Jones - Scott, 7 3-16 pounds.
John B. Ellison - Scott, 7 1/4 pounds.
Fred Moore - Purdey, 7 7-16 pounds.
Leonard - Westley Richards, 7 1/2 pounds.
Mott - Crown grade Greener, 7 2-16 pounds.
J.S. Robbins - Greener hammer gun, 7 1/2 pounds.
R. Welch - Purdey hammer gun, 7 1/2 pounds
Downing - Scott, 7 6-16 pounds.
J.K. Palmer – Francotte, 7 1/2 pounds.
Edwards - Scott Premier, 7 pounds.
J. Wolstencroft - Greener, 6 15-16 pounds.
Eckert - Scott Premier, 7 1/4 pounds.
Shells were 45 - 49 grains (3 1/4 - 3 1/2 drams) smokeless powder and 1 1/4 oz. shot.
Capt. Money (2nd in the 1894 GAH) and George Work (3rd in the 1893 GAH) tied at 94 killed.

1 1/4 oz. 3 1/2 Dr. Eq. (1275 fps) in an 8# gun = 27 ft/lbs, and there are links to vintage live action videos showing the reaction of the head and body to that recoil here
http://www.trapshooters.com/threads/vintage-live-action-trap-and-live-bird-shooting.514889/

This is Tod Sloan possibly at West Chester. At the 1901 GAH at Live Birds Sloan used a W & C Scott & Son with 1 1/8 oz. and 3 1/2 Dr. Eq. DuPont Bulk
1 1/8 oz. at 1300 fps in a 7.5# gun would have about 25 ft/lbs of free recoil



The Baker Gun Quarterly, Volume 5, No. 3, May 1900 had an article on the weight of Trap/Pigeon guns (all 12g) used by Capt. A.W. Money (8 pounds - Money used a Greener, Smith, and Parker), C.W. Budd (7 pounds 14 ounce Parker), H.D. Bates (winner of the 1900 GAH at Live Birds; 7 pounds 13 ounce Parker), R.O. Heikes (7 pounds 15 ounce Parker but after the GAH at Live Birds he went back to his Remington hammerless and won the 1900 [1st] GAH at Targets), J.S. Fanning (7 pounds 15 ounce Smith), W.R. Crosby (7 pounds 12 ounce Baker), and Col. A.G. Courtney (7 pounds 14 ounce Remington CEO).