TMJ ammo stands for “Total Metal Jacket” ammunition. It refers to bullets completely encapsulated in a thin layer of copper, covering not just the sides and tip but also the bullet’s base. This design happens through an electroplating process that deposits a uniform copper coating over the entire lead core of the bullet. TMJ bullets […]
By Guy J. Sagi Full metal jacket bullets have an outer shell made from one metal, with a softer interior core manufactured from another—the latter typically being lead. FMJ is the firearm industry’s shorthand for the design, although some militaries and enthusiasts refer to it as “ball.” FMJ loads are full metal jacket ammo and […]
