2007-07-09 13:15:09 · 3 answers · asked by Sonny O 3 in Sports ➔ Outdoor Recreation ➔ Hunting
Most cartridge cases are made of brass alloy. Some use aluminum, steel, or plastic, but the brass case is most popular and easiest to manufacture.
The typical brass case is formed from annealed sheet by drawing with multiple punch and die sets. The first stage of the multiple die set forms the metal, the second stretches the metal deeper, the third forms the rim, and so on. Each step stretches the metal slightly farther until the final stage produces an accurately formed case. The cases are trimmed to length and the primer hole is punched.
Heat treating and stress relieving are performed on some types of cases to improve durability. This is done in large ovens, where baskets of cases are heated with enough temperature to soften the metal without distorting it. When cooled, the metal is "relaxed" and better able to take the punishment of firing. Some cases are nickel plated for durability in reloading, corrosion resistance, and for appearance. Each case is stamped with information such as caliber, manufacturer, munitions codes, and year of manufacture.
2007-07-09 13:37:35 · answer #1 · answered by Tyler N 2 · 2⤊ 1⤋
Most are molded out of brass.
Here is a WIKI quote
A casing, also called case or the brass, is the part of a cartridge that contains the gunpowder charge, the primer, and the bullet. After a shot is fired, the casing is empty because its gunpowder charge has burned, the primer has been used and the bullet has been propelled. Automatic and semiautomatic firearms, which extract and eject the casing automatically as a part of their operation, sometimes damage the casing in the process of ejection. Brass is a commonly used material, as it is ductile enough to be reformed and reloaded several times. However, some low-quality "plinking" ammunition, as well as some military ammunition (Chiefly from the former Soviet Union and Communist China) is made with steel casings because steel is less expensive than brass. As militaries typically consider small arms cartridge casings to be a disposable, one-time-use affair, the lack of ductility is not a disadvantage for this application.
2007-07-09 13:28:45 · answer #2 · answered by Traveler 7 · 1⤊ 2⤋
As I understand it, the brass is pressed out of a sheet. I don't know all the details.
2016-05-21 23:55:36 · answer #3 · answered by ? 3 · 0⤊ 0⤋