You can cast lead ammo for low pressure loads, but not for high pressure loads like .223 That much pressure would smear the lead up and down the barrel. We do have some bullet molds. I used one to consolidate scrap gold after making our wedding rings.https://twitter.com/kBob42/status/963454056537772032 …
2/ here's a picture of all the gold dust I saved while filing the rings, and a picture of the gold bullets I made to consolidate it (and the unused casting grains)pic.twitter.com/40hq0BVPvM