The 43 Egyptian Remington cartridge, also known as the 11.43x50R or .43 Egyptian, is a metallic black powder rifle cartridge developed in the 19th century. It was specifically designed for use in the Remington Rolling Block rifles, which were widely adopted by the Egyptian military during that period. The cartridge typically features a rimmed, bottlenecked brass casing, a large rifle primer, and a bullet diameter of approximately 0.43 inches (10.9 mm).
Primarily used for military purposes, the 43 Egyptian Remington was favored for its powerful performance and reliability. The ammunition facilitated around 1,350 feet per second (fps) muzzle velocity, adequate for the military engagements of its time. The cartridge saw usage in conflicts such as the Anglo-Egyptian War but has since become obsolete and is now primarily of interest to collectors and historical firearm enthusiasts.