Quoted:
Anyone read "Unintended Consequences?" Remember when he makes bullets out of nylon for shooting people inside airplanes and whatnot? What about delrin? What other materials are there out there besides carcinogenic metals that you could make bullets out of?
(ice bullets for the lose)
Gluelits....
The fellers at cast boolits have been developing an indoor lightweight bullet made from, get this, hot glue. I can't remember the process but it does use standard bullet molds and the weights are pretty consistent.
First time I read about it I had flashbacks from "Unintended Consequences" go through my head.
Oh, I don't know if they have experimented with it but gas checks are your friend when pushing certain materials too higher velocities.
ETA;
AFSOC, you are right. Smelting lead at normal temperatures does not put any sort of "lead fumes" in the air. As long as you don't chew your nails, swallow bullets or drink molten lead and remember to wash your hands thoroughly after casting your risk level is minute.