The real trailblazers are the dudes working to make ammo from scratch using accessible tech and components. (Reloading a primer, for example.)
Discussion
Reloading primers looks fairly tedious, but possible with a way to tap out the dimple and get the anvil repositioned well. Making a noncorrosive priming compound is the part I haven't figured out. I try to keep up on the know-how, but for now sticking to loading with commercially available primers.
It is tedious, but can be done.
Non-corrosive might be a bit too far for that level of prep. I'd rather have a ton of corrosively primed rounds than not have any.