Need to learn how to make our own, from scratch.

Let's see-bullet, powder, primer, case. We need to be able to make all the components and have a capacity to do it from scratch. Bullets can be cast, the copper jacket pressed from pipe. Nitrocellulose or an ammopulver substitute, a reliable recipe has to be set and quality control maintained. Primer... that's basically a tiny quantity of detonator.

The hardest component will be forming new brass; the high pressure die machines will have to be bought or made. Oh, the raw material-will we be able to maintain use of brass or will substitutes like steel, aluminum and plastic be needed?