Why is all military ammo full metal jacket?

Answer 1

Law of land warfare outlaws fragmenting/expanding ammunition.

InIt2WinIt

Answer 2

Balls and bullets were at one time lead, solid , soft lead. The reason large numbers of arms and legs were amputated during the American Civil War was that when a lead ball or minie bullet hit a man's limb it destroyed it. It wasn't a wound that healed because the bones would be destroyed and pieces of lead too small for the surgeon to pick out would be left in the limb.
As cartridges developed and firearms became more modern the lead bullet would travel at a speed that melted the outer surface of bullet which left a thin coating of lead on the rifling of the barrel. So a copper casing was applied to the bullet.This cut down on the lead fouling. It also caused the bullet to pass through the body without fragmentation or spreading. This meant that unless the bullet struck a major bone or organ the enemy soldier kept coming. A "Capt. Cley at a British cartridge manufacturing plant at Dum Dum,Bengali discovered that removing the metal jacket at the tip, and by X ing the tip of the bullet, the bullet would "blossom" as it struck the body causing great incapicitating, bloody wounds. The then state of medicine offered no assistance to such wounds.Alright, this was permissible when the western powers were shooting "natives" but not when they started shoot each other. The powers that be banned them, in 1899, from military use and insisted that all military ammo be full metal jacketed. Sorry I will go on.

Answer 3

Geneva convention prohibits the use of soft pointed , lead exposed hollow points (Dum _Dum ammo were called a sit its inhumane to the enemy secondary its functionality in moderns auto weapons<<<< solid steel bullet would rip-destroy the lands and groves in the riffled barrels it appears to be steel in fact is a mild alloy some of its core instead of lead was replaced with steel core just as AP rounds in both the 7.62x51 and the old M1 grand ammo full metal jacket ammo in fact does not enhance the penetration specially with its spritzer design if you want more penetration seek out a round nosed bullet

Answer 4

Military ammo is FMJ because without it, the lead core is more likely to jam the rifle, esp. in full auto. Also, military ammo used to be solid steel but I think the Geneva convention outlawed it because it could penetrate lots of the enemy at once (T&T), meaning through and thouugh thus causing as many wounded as dead. I've got some old WW1 ammo made of steel to prove it. Try buying solid steel ammo anywhere for todays rifles. Good question.

Answer 5

Geneva convention outlawed dumdum bullets.

Answer 6

it gives the best penetration on light armor