@Squeaks cuz im pretty sure u need some gunpowder in the bullets, anyways imagine the amount of precision needed to make a bullet, its not just a piece of metal, there's the shell, the round etc.
@Cybogr3Ninja it's actually pretty easy if you are good at molding brass. and there is a tool you use to press the brass into the shell. if you get good at it you can make 200 rounds in a day