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The Rocket Ball was one of the earliest forms of
Early Caseless Ammo: The Rocket Ball
Colette Gravity Pistol
(which have used ''Rocket Ball'' ammunition) Ammunition {{ammo-stub
The Rocket Ball was one of the earliest forms of metal
A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typi ...
lic cartridge for firearms
A firearm is any type of gun designed to be readily carried and used by an individual. The term is legally defined further in different countries (see Legal definitions).
The first firearms originated in 10th-century China, when bamboo tubes ...
, containing bullet
A bullet is a kinetic projectile, a component of firearm ammunition that is shot from a gun barrel. Bullets are made of a variety of materials, such as copper, lead, steel, polymer, rubber and even wax. Bullets are made in various shapes and ...
and powder in a single, metal-cased unit.
Construction
The Rocket Ball, patented in 1848 by Walter Hunt, consisted of alead
Lead is a chemical element with the Symbol (chemistry), symbol Pb (from the Latin ) and atomic number 82. It is a heavy metals, heavy metal that is density, denser than most common materials. Lead is Mohs scale of mineral hardness#Intermediate ...
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 packing 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
A paper cartridge is one of various types of small arms ammunition used before the advent of the metallic cartridge. These cartridges consisted of a paper cylinder or cone containing the bullet, gunpowder, and in some cases, a primer or a lub ...
with a durable package capable of being fed from a magazine. The cap was blown out of the bore upon firing. The Rocket Ball was used in magazine fed lever action
The toggle-link action used in the iconic Winchester Model 1873 rifle, one of the most famous lever-action firearms
Lever-action is a type of action for repeating firearms that uses a manually operated cocking handle located around the trigger ...
guns, allowing the first easily manufactured repeating single chamber firearms.
Use
While the Rocket Ball provided the means of making practical repeating firearms, it was not an ideal solution. The limited volume in the base of the bullet severely limited the amount of powder that could be used, and thus limited the potential velocity and range of the cartridge. Withmuzzle energy
Muzzle energy is the kinetic energy of a bullet as it is expelled from the muzzle of a firearm. Without consideration of factors such as aerodynamics and gravity for the sake of comparison, muzzle energy is used as a rough indication of the des ...
of only about 56 foot-pounds
The foot-pound force (symbol: ft⋅lbf, ft⋅lbf, or ft⋅lb ) is a unit of work or energy in the engineering and gravitational systems in United States customary and imperial units of measure. It is the energy transferred upon applying a ...
(76 joule
The joule ( , ; symbol: J) is the unit of energy in the International System of Units (SI). It is equal to the amount of work done when a force of 1 newton displaces a mass through a distance of 1 metre in the direction of the force applie ...
s), the Rocket Ball was less powerful than even the most feeble of modern "pocket pistol
In American English, a pocket pistol is any small, pocket-sized semi-automatic pistol (or less commonly referencing either derringers, or small revolvers), and is suitable for concealed carry in either a coat, jacket, or trouser pocket.
Pocke ...
" cartridges, such as .25 ACP
The .25 ACP ( Automatic Colt Pistol) (6.35×16mmSR) is a semi-rimmed, straight-walled centerfire pistol cartridge introduced by John Browning
John Moses Browning (January 23, 1855 – November 26, 1926) was an American firearm designe ...
.
Despite these limitations, the Rocket Ball was used in a number of attempts at making a commercially successful firearm, culminating in the Volcanic Repeating Arms
The Volcanic Repeating Arms Company was an American company formed in 1855 by partners Horace Smith and Daniel B. Wesson to develop Walter Hunt's Rocket Ball ammunition and lever action mechanism. Volcanic made an improved version of the Rock ...
Company. The Volcanic cartridge went one step further, adding a primer to the cap of the Rocket Ball, making the ammunition completely self-contained.
See also
* Minie ball *Caseless ammunition
Caseless ammunition (CL), or rather caseless cartridge, is a configuration of weapon-cartridge that eliminates the cartridge case that typically holds the primer, propellant and projectile together as a unit. Instead, the propellant and primer ar ...
References
External links
Early Caseless Ammo: The Rocket Ball
Colette Gravity Pistol
(which have used ''Rocket Ball'' ammunition) Ammunition {{ammo-stub