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You cant find lead wheel weights up here anymore, and, from what I hear down there as well. Everything here is either zinc or iron.steamin10 wrote:I use reclaimed lead sheet, or virgin ingot for all the round ball, (soft) and add 20% wheel weights to any patched ball or bullet, for my rifles. (hard).
To the best of my knowledge there is no zinc in the older lead wheel weights. Antimony and tin are the alloying elements. From what I have read and heard from talking to people zinc has a negative effect on the surface tension of the molton alloy and does not allow it to flow nicely and as a result fine details and sharp corners are the causalities. As well the zinc has an affinity for either antimony or tin, I can't remember which now, and when the alloy is contaminated with zinc it is not readily separated. I talked with a chemistry teacher and his response was it could be done chemically, but not readily with easily obtainable chemicals. I have heard of one gentleman in southern BC casting bullets with zinc or zinc contaminated lead. Zinc, hardening the alloy much like antimony and tin are used for but less expensive. He reported having good luck by taking a vibrating Palm sander turning it upside down, fastening it to his bench and resting his molds on the sander while pouring. I've never tried it but... Who knows, one day maybe.steamin10 wrote:...and have zinc and other metals in them, and are quite a bit harder than pure lead. The lead-linotype kind of mix is good for small detail parts...