What are bullets and ammolition for other weapons made out of and why?

Your questions reek of ignorance but I will try to enlighten you; small arms ammunition (check the spelling) is mostly a lead alloy with a copper jacket. By small arms I mean pistols, rifles, squad machine guns, sub-machine guns, and carbines. Lead, nor copper is attracted to a magnet. Larger weapons have some tungsten, titanium, or depleted uranium in side the projectile to make it armor piercing. Once again, these elements are not attracted to magnets. A bazooka was probably last used in the early days of Vietnam circa. 1964. The LAAW, TOW, and DRAGON rockets use exploding warheads with various materials turning into high speed fragments. Anti-aircraft missiles use graphite rods to damage engines and flight surfaces. So you really don't have to hit the aircraft, just get close to it. Shotguns are illegal for warfare according to the Geneva Convention as are exploding bullets from small arms. Metal is chosen for bullets because it is plentiful, easy to machine, hard enough for the job, and it has inertial energy from weight. That means aluminum is not used for bullets or grenades. Except for the Italians in WW II. Their grenades were made of aluminum particles and there were cases were a man dropped his grenade, it exploded at his feet, and he walked away from the experience. Many people survive with bullets in them. Ask any doctor or veteran. Note President Andrew Jackson had two bullets in him and Theodore Roosevelt had one bullet in him when they died from other causes. Lead doesn't rust. I hope this explanation makes you a much smarter person.