.43 Spanish

[4] The .43 Spanish cartridge was produced after Spain purchased the newly invented rolling-block action single-shot rifle.

[7] The Spanish military version of the cartridge was later upgraded in 1889 to a "heavier, brass-jacketed reformado bullet".

[8] While Remington stopped manufacturing the cartridge in 1918, its use in the United States became widespread after World War II because it was sold as a surplus.

[9] It was also the reason why American soldiers suspected that the Spaniards used poison in their bullet during the Spanish-American War.

[9] It corroded in the tropics, producing a powdery pale green verdigris once they are exposed to high humidity or salty sea air over time.

Making of .43 Spanish cartridges in Union Metallic Cartridge Co. factory at Bridgeport, Connecticut , 1877