Rocket Ball - Construction

Construction

The Rocket Ball, patented in 1848 by Walter Hunt, consisted of a lead bullet with a deep hollow in the rear, running a majority of the length of the cartridge. The hollow, like that of the Minie ball, served to seal the bullet into the bore, but Rocket Ball put the cavity to further use. By packaging the deep cavity with powder, and sealing it with a cap with a small hole in the rear for ignition, the Rocket Ball replaced the earlier paper cartridge with a durable package capable of being fed from a magazine. The cap was blown out of the bore upon firing, leaving no cartridge case to be ejected, making the Rocket Ball a form of caseless ammunition. The Rocket Ball was used in the earliest magazine fed lever action guns, allowing the first practical repeating, single chamber firearms.