It can be.
Some studies indicate the repeated use (20,000) of steel cased ammo will prematurely wear the barrel on semi auto rifles. The normal user will not see the difference.
The EJECTOR. The EXTRACTOR withdraws the empty case from the chamber, but the EJECTOR throws it out of the firearm.
Several possibilities. Usually it is made of brass. However, there are cheap steel case rounds, and expensive nickel case rounds. Most often, though, they are made of brass. Once fired and ejected from the rifle, it is even referred to as "rifle brass" regardless of what it is made of as a reference to expended ammo. "Someone must have been doing a lot of shooting here. There's brass everywhere.".
Yes, describes contents
4 in ammo can
No. Dimension-wise, they are similar, but there are differences in neck angles and case thickness. .223 Remington ammo can be fired in a 5.56 chamber, but 5.56 ammo should never be fired through a .223 Remington chamber.
A metal cartridge case is formed into shape by machinery. In centerfire ammo, a primer is press fitted into the primer pocket. A measured charge of gunpowder is poured into the cartridge case, and a bullet pressed into the mouth of the cartridge case, which MAY be crimped to hold the bullet in place.
A case is made with no projectile, loaded with powder, and crimped at the end.
Ammunition that uses a metal case. other than brass
Perry Mason The Case of the Shooting Star - 1986 TV is rated/received certificates of: UK:PG
When the slide or bolt moves to the rear, part of that bolt- the extractor- grips the rim or groove of the cartridge case, and pulls it out of the chamber. At the end of the stroke, another part, the ejector, flips the cartridge out from under the extractor, and out of the gun.
Most watch cases have on the back the words "made of steel" if they are steel.