Making Prepped Modern Ammo From Scratch; Powder, Bullets, Cases and Primers

If and when you make your own ammo you first need to study loading and smelting. In survival situations I  recommend coal smelting because once equipped with propper forms and furnace coal can be found in most parts and where it can't it is cheap to stockpile. Map gas and other methods are costly and rely on infrastructure.

This is extremely dangerous and should only be done be professionals and still can cause injury or death. In some places laws apply.

The first thing I will cover is bullets. Numerous materials can be cast into slugs, bullets and pellet's. These include aluminum, brass, led, copper, steel and iron . We are going to talk about iron and more specifically magnetite because if you have a water way or desert you have lots of this hard iron. Magnetite also does not rust with an oxide of 4. Please note to study your barrel first because it will make hard bullets and should only be fired from chrome and other barrels capable of firing rounds this hard safely.

Getting magnetite is easy you just run a big magnet over sand and use the magnet to separate and purify the  ore.

Once you have the material you want use you can cast the bullets with a high heat cast. The history of iron bullets dates to World War II when late in the war Germany ran out of its led sources. They successful used iron bullets like the one below.
 Beware that it is illegal to make pure iron or steel pistol bullets with the exception of 22 . This ammo is likely to pierce most armor.

Here is a link on how to make gunpowder. http://m.youtube.com/watch?v=Ol9wuQO5v-A

As far as cases and primers there are casts for those.