Be aware and sort thru your weights carefully before ya toss 'em in the pot. Some are made of really nasty stuff and will ruin a pot of good metal fast. Many states have regulated wheel weights and depending on the make , they have too much tin , antimony , zinc , and other nasty stuff. Some even contain powdered tungsten , which will ruin your barrel as well. There are several sights dealing with lead free wheelweights. Check them out and learn how to spot and identify them.
AAMOF , I'm not sure the good ol' lead weights ever had a specific mix.
