FMJ Meaning and
Definition
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FMJ stands for Full Metal Jacket. It is a term primarily used in the ammunition industry to refer to a specific type of firearm bullet or ammunition. A full metal jacket bullet is a projectile that is completely encased in a metallic shell or jacket, usually made of copper or a copper alloy, that surrounds the lead core. The purpose of this jacket is to improve the bullet's penetration and decrease barrel fouling.
In terms of design, the shape of FMJ bullets may vary, but they typically have a cylindrical shape with a rounded or pointed tip. The lead core is entirely covered by the jacket, leaving no exposed lead on the front of the bullet. The back end of the bullet usually remains open or features a small lead base, exposing the base of the bullet.
FMJ bullets are commonly used in military and law enforcement applications due to their reliable feeding and ability to penetrate targets effectively. The jacket surrounding the bullet aids in reducing lead fouling in the barrel, making them ideal for high-volume shooting. However, they are also popular among recreational shooters, especially for training purposes, as they tend to be more affordable than other bullet types.
It is important to note that FMJ bullets are typically designed for target shooting and self-defense. They are not designed to expand upon impact, unlike hollow-point ammunition. Due to their lack of expansion, FMJ bullets may over-penetrate targets and potentially pose a greater risk of collateral damage when used for personal defense.
Common Misspellings for FMJ
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