How technologically advanced are today's cartridges/bullets?

[Mangetout]

@engineer_comp_geek

I could go back in time and explain how to make a functional flintlock to anyone who could make steel. Without steel, I could explain how to make a matchlock to anyone who can make a barrel strong enough to withstand the pressure.

It would probably take some trial and error to get the gunpowder mixture correct as well as figuring out how to make it without blowing yourself up.

I could also explain to Mr. Bronze Age Dude how to make steel, but that would also require some fiddling to get the mixtures right.

Good points - the language barrier might be the hardest part.