Lord Robert Baden-Powell said in his first book, FIELD NOTES ON SOUTHERN AFRICA, (Really his "first book" was really a pamphlet that preceded his famous book, SCOUTING) that he knew a big-game hunter that had/hunted with a TWO-BORE double-barrel rifle, that, "- - - - - weighed near unto three stone."
(A British stone was about 14 pounds.)
Note: To quote the famous big-game hunter, Harry Selby, "- - - - a heavy caliber hunting rifle is 'feather-light', when carried for you by a professional gunbearer."
The loads for what B-P called the "fire-breathing monster" was reportedly a 1/3 pound conical bullet, in front of 8 drams of BP.
(Shooting that 2-bore, imVho, would be about as much "fun" as going a few rounds with George Foreman in his prize-fighting days.)
yours, satx