.22 Winchester Automatic

.22 Winchester Automatic ammo is used in compatible vintage rimfire rifles chambered specifically for this cartridge, most notably older Winchester self-loading designs. It is a specialized historical rimfire round that differs from other .22 rimfire cartridges and is intended for use only in firearms built for its unique chambering. Different loads can affect reliability, function, and shooting performance depending on the firearm and condition of the platform. This category includes .22 Winchester Automatic ammo built for proper compatibility, dependable function, and practical use in supported vintage firearms.