The first 'long range' 20?
Dec. 21,
1895
http://www.la84foundation.org/Sports.../SL2613012.pdf
Lieutenant A. W. Du Bray, of Dayton, Ky.. shooting at Shreveport, La., on November 28 as the guest of Mr. Samuel Enders, and using a
20-gauge Parker gun, made an excellent bag of 77 ducks, 45 of them being mallards, 25 teals and the rest pintails and wood ducks. He writes his friends, regarding the outing, that it was one of the finest day's sport he ever enjoyed.