The original Western Cartridge Co. Magnum-Ten Super-X load was two ounces of chilled shot in a 3 1/2 inch Field case or two ounces of Lubaloy shot in a 3 1/2 inch Record case. As always, Western just said "Maximum Load" and didn't give a Dram Equiv. on their progressive burning powder Super-X loads. Example of the difference in the load data on Western Cartridge Co. Super-X and Winchester Super-Speed shells.
The Super-X load was almost full grown when the Magnum-Ten was introduced. Western had added the Lubaloy shot option in 1929, their shells got non-corrosive priming in 1931, and in the very next
Western Ammunition for Rifle, Revolver and Shotgun, Sept. 15, 1932, they introduced their Seal-Tite wads in their 10-, 12-, 16-, and 20-gauge shells. I don't believe the Olins put out any 3 1/2 inch Magnum-Ten shells in their Winchester brand until the very late 1960s or early 1970s. Remington Arms Co., Inc. still didn't list any 3 1/2 inch Magnum-Ten shells in their 1935 Ammunition catalogue, but they were offering 10-gauge 3 1/2 inch Magnum Nitro Express shells with 5 Drams Equiv. and 2 ounces of shot by their 1938 Ammunition catalogue.
