While the 12-, 16- and 20-gauge 2 3/4 inch Magnum loads were introduced in late 1954, the 28-gauge 2 3/4 inch Magnum load with 1 ounce of shot wasn't introduced until the January 3, 1961, Western Cartridge Co. ammunition catalog.



Remington/Peters didn't jump on the 28-gauge Magnum bandwagon.