When the .410-bore shot shell was introduced in the U.S. circa 1915, it came in two lengths, the 2-inch shell with a 3/10 ounce payload and the 2 1/2 inch length with a 3/8 ounce payload.









Early on the ammunition companies didn't even say what a small amount of shot was in the shells.



The 3-inch .410-bore shell with 3/4 ounce of shot was introduced along with the Winchester Model 42 .410-bore pump gun in 1933, and a year or two later our ammunition companies upped the payload of the 2 1/2 inch .410-bore shell to the 1/2 ounce we know today.


Last edited by Researcher; 02/10/16 12:53 PM.