Cartridge Hall of Fame: 38-40 Winchester Ammunition | MidwayUSA
The .38-40 Winchester, introduced in 1874, was a medium-power cartridge originally paired with the .44-40. It gained fame in the Winchester Model 1873 rifle and was also popular in Colt Single Action Army revolvers. Modern loadings typically use 170-180 grain bullets, and while historically used for defense and hunting, it's now primarily seen in Cowboy Action Shooting.









