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A full metal jacket (FMJ) bullet is a small-arms projectile consisting of a soft core (often lead) encased in an outer shell ("jacket") of harder metal, such as gilding metal, cupronickel, or, less commonly, a steel alloy.
Some common types are the full metal jacket boat tail, full metal jacket flat nose, and full metal jacket truncated cone. Each of these jacketed bullets are tailored for a specific use, but they retain the basic lead properties of all FMJ rounds.
Full metal jacket ammo is a great choice for most types of shooting. However, we don’t recommend you use it for self-defense. FMJ ammo doesn’t expand the same way as ammunition specifically designed for self-defense use (like JHPs).
A full metal jacket bullet consists of a soft lead core and a hard metal jacket. This jacket is made of copper or a copper alloy and covers the entire length of the bullet, leaving only the base exposed.
What is the environmental impact of Full Metal Jacket (FMJ) bullets compared to lead bullets? How does hollow point ammunition perform uniquely? What defines armor-piercing ammunition and its use?
Full Metal Jacket (FMJ) bullets exhibit a distinctive construction method that sets them apart from other bullet types. The hallmark of FMJ design is the encapsulation of a soft lead core within a jacket made of copper or a similar material.
A full metal jacket bullet has a soft core (most often lead) that is encased in a separate outer shell made of harder metal. Bullet manufacturers have their own propriety methods for creating full metal jacket bullets.
Full Metal Jacket (FMJ) Thanks to a popular movie by the same name, even non-shooters have heard of the full metal jacket. One of the most popular bullet designs on the market, FMJs are constructed of an outer jacket (usually made of copper) that surrounds an inner malleable lead core.
FMJ stands for Full Metal Jacket. FMJ bullets typically have a soft lead core covered by a swaged metal jacket covering the outside of the bullet with an exposed lead base. TMJ stands for Total Metal Jacket. TMJ bullets also have a soft lead core but are completely covered in a thin layer of copper known as a copper jacket.
The full metal jacket flat nose (or FMJ-FN) is just as the name implies – a full metal jacketed bullet with a flat nose. This type of ammunition is popular among pistol shooters and is often sold on-site at shooting ranges, both indoor and outdoor.
