During most of the years Parker Bros. offered 28-gauge guns, our North American ammunition manufacturer's "standard" 28-gauge cartridge was a 2 1/2 inch shell with a load of 1 3/4 drams bulk smokeless powder pushing 5/8 ounce of shot. Some at various times also offered a 2 dram load in a 2 7/8 inch case pushing the same 5/8 ounce of shot. In 1932, Western Cartridge Co. introduced their 28-gauge Super-X 3/4 ounce load in a 2 7/8 inch case.
Chas. Askins the Elder was handloading 2 7/8 inch 28-gauge cases with 3/4 ounce of shot for his 6 3/4 pound 30-inch barrel Parker Bros. gun in the decade before The Great War.
In the last couple of years before WW-II 2 3/4 inch 28-gauge skeet loads began appearing and shortly after all 28-gauge loads were being put up in the 2 3/4 inch case.
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