I thought before if you used a ping-pong ball to make a plaster or whatever mold and then pored round lead balls that size, they’d due some SERIOUS damage. You could melt down old wheel weights or something for the lead. Website for ya:
http://slinging.org/ Be careful, Andy. Melting and casting lead can leave you with elevated levels of lead in your body. Not a good thing. At the least you want good ventilation. Do not breath the lead laden air above your melting pot or your castings.
Here's a link to get you started.
Lead Safety
