Lead sling ammo

back in the day when slings were actually used in war soldiers used to make their own ammo from lead, they would melt the lead, stick their thumb into some sand and pour out a shot for their sling, players should be able to do the same.

oops wrong form can someone move this to suggestion?

In vanilla Cataclysm, bearings are rather generic and can be made using most of the available metals, lead include. No effect on properties.

[shameless plug]
Meanwhile in the experimental versions, More Survival Tools splits off the available materials so the denser stuff, primarily lead, is usable for a slightly more potent ammo, also using clay or sand as an alternative to a press for the mold.
[/shameless plug]