Originally Posted By: Researcher
The North American ammunition manufacturers, with Western Cartridge Co. leading the way with their Super-X loads, introduced progressive burning powder high velocity loads in 1922. The early Western Super-X loads were the 1 1/4 ounce in their 12-gauge 2 3/4 inch Field shell --



and the 1 ounce load in their 20-gauge 2 3/4 inch shell. The early Super-Fox brochure only discusses the 12-gauge --



By 1923 the 16-gauge Super-X load of 1 1/8 ounce of shot was introduced, put up in the 2 9/16 inch Field shell.

They were a bit slow on getting the 12-gauge 3-inch Super-X load of 1 3/8 ounce of shot in their 3-inch Record shell out, but pretty soon the Super-Fox brochures and A.H. Fox Gun Co. catalogues had this inserted --



and these shells were appearing on dealers shelves --



By the 1925 Super-Fox brochure, the A.H. Fox Gun Co. included the 20-gauge on the cover and on the specifications page, but they didn't change any of the text on the other 18 pages of the brochure --



Have I babbled enough?
No-- babble on- this is a great thread, and as an owner 9and shooter) of two Pre-`1951Model 12 3" Magnums, I want to know if Winchester jumped into this river of hyperbole (whatever that might be) in 1935 when they brought out that "souped up M12"--

"The field is the touchstone of the man"..