Difference Between TMJ Ammo and FMJ Ammo

TMJ Ammo vs FMJ Ammo

Total metal jacket (TMJ) ammo and Full Metal Jacket (FMJ) ammo might have a thin difference. Some ammo fans are not even aware of the difference between the two. It is said that one can not be called a pure expert on weapons if one cannot differentiate these two.

TMJ

Total metal jacket is a design in which it covers the lead core of the bullet completely. It is basically made up of brass or copper and that it is usually used indoors to cut the lead content in the air. Originally this is created as a low-cost option to make a jacketed bullet. Most indoor shooting ranges, recommends that this type of bullets be used during practice.

FMJ

Full metal jacket is an ammo that has a casing formed around the base core. Other samples have a hollow opening with lead exposed in the core. It’s jacket is usually made up of solid material such as copper-nickel, brass or steel alloy. It is also noted that this is preferable to be used in gas operated weapons due to the lead deposits that it has.

Difference between TMJ and FMJ

Both are not made to expand on impact however, the difference lies on their penetration and the price range as well. Since TMJ is considered as plated bullets, it has been observed that its penetration with a hard target is not as efficient as using an FMJ since the plating is more fragile and will likely fragment more as compared with the full metal jacket. It is also believed that TMJ due to its thin plating, has a limited capacity to be pressured in high velocities, not to mention that it is more expensive than the full metal jacket type.

It has been debated that TMJ is safer as compared to FMJ as per airborne lead is concerned. Some says otherwise, but in terms of shooting, it will all boil down to the kind of activity that is being done, be it an actual operation or a just simply practicing.