I am getting into casting my own bullets for my .44 and .357 mags. I bought 46 lbs. of wheel weights at the scrap yard for cheap. About 25% turned out to be steel so I separated them out. I did a search here and found several threads on casting bullets and warning about "ruining your lead with Zinc". Can anyone explain this to me? Where does the Zinc come into the equation? And does Zinc ruin lead for reloading and why? I have cast bullets for my muzzle loaders in the past and just used pure plumbers lead. I did some research and found I needed a harder alloy than pure lead. I will have at least a hundred more questions as this progresses so I will say thanks in advance for all replies!