Bro. Williamson didn't do quite that good
Capt. Charles Askins and E.M. Sweeley “Ballistics of the Shotgun” series in
Outdoor Life
“Late Developments in Guns and Ammunition” DuPont’s powder and Western’s Super-X loads
https://archive.org/details/sim_outd...e/234/mode/2up
November 1923, “An American Super 12” The Super Fox boring & patterns
https://archive.org/details/sim_outd...e/356/mode/2up