Why Does Nato Use Fmj Ammo?

Most NATO militaries use only FMJ rounds. This is due to an international treaty that was signed many years ago that forbids the use of expanding rounds. However, the USA never ratified that section of the treaty, and the US Army just recently adopted hollow point ammo along with the new Sig Sauer® M17 pistol.

Why does the military use FMJ 9mm?

The use of full metal jacketing in military ammunition came about in part because of the need for improved feeding characteristics in small arms that used internal mechanical manipulation of the cartridge in order to chamber rounds as opposed to externally hand-reloading single-shot firearms.

Why do they use FMJ in war?

"Mandated by the Geneva Convention of 1922, the purpose of enclosing bullets with full metal jackets was to reduce combat fatalities. The bullets were designed to pass through bodies and, if no major organs were struck, only to wound the victim. Before metal jackets, bullets often detoured inside the body."