The folks that make wheel weights are now alloying them with calcium to harden them instead of antimony. Lead with calcium content will not make a bullet that is worth a rip. The lube grooves will look like they are frosted,(undersized at that point) the sharp edges that need to be there will not be in evidence, and you will cast a most nasty bullet. Combine that with the risk of zinc wheel weights in the mix....it ain't worth it.
Darned shame!!!!!!!
Tire shops in my area call me all the time wanting to sell wheel weights...like they are all lead in content......I quit buying them a long time ago when Zinc was introduced to the mix. Add calcium to the mix...no way.