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Ceradyne was founded in 1967 [3] and in late 2004, the company added new product lines by acquiring ESK Ceramics of Kempten, Germany. [4]In addition to producing ceramic components for industrial processes such as silicon foundries and ceramic fuel pellets for nuclear reactors, Ceradyne researched and produced varieties of ballistic armour for both personnel and vehicles. [5]
Cartridge case Bullet (grains) Bullet structure Magnetic case Magnetic bullet OAL (inches) Velocity (fps) Velocity Average (fps) Energy (ft-lbf) 7.62×39 LU Red Army Standard: lacquer coated steel, with green sealant: 123: lead core bi-metal jacketed, copper clad steel: Yes: Yes: 1.674: 2311-2316: 2309: 1456
To manufacture cases for cartridges, a sheet of brass is punched into disks. These disks go through a series of drawing dies. The disks are annealed and washed before moving to the next series of dies. The brass needs to be annealed to remove the work-hardening in the material and make the brass malleable again ready for the next series of dies ...
In testing, the comparatively hard brass bullets wore out barrels far more quickly than standard solid lead and copper-jacketed lead rounds, since they did not deform to fit the rifling. [1] In an attempt to reduce barrel wear, the steel projectiles had a copper cup which made contact with the rifling; on brass projectiles, brass driving bands ...
The rather peculiar Burnside cartridge. Burnside-Patent Burnside carbine in loading position. The carbine was designed and patented by Ambrose Burnside, who resigned his commission in the U.S. Army to devote himself full-time to working on the weapon. The carbine used a special brass cartridge which was also invented by Burnside. This cartridge ...
A headstamp is the markings on the bottom of a cartridge case designed for a firearm.It usually tells who manufactured the case. If it is a civilian case it often also tells the caliber: if it is military, the year of manufacture is often added.
.950 JDJ cases are approximately 70 mm in length, and are based on a 20×102mm Vulcan case shortened and necked up to accept the .950 in (24.1 mm) bullet. Projectiles are custom-made and most commonly weigh 3,600 grains (230 g) which is 8.2 ounces or over half a pound.
A gunner dealt with cartridges and would know that he could load (e.g.) cartridge X or Y for a full service charge for his gun, and cartridge Z to fire a star shell. Cartridges were sometimes made up of fractions of charges e.g. a 6-inch (152 mm) gun cartridge may be made up of two half charges or one two-fifths and one three-fifths laced together.
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