The lead used in lead shot varies in amount of inorganic arsenic depending on the size of the shot. Contact Metallico Granite City and ask for a materials sheet on their shot. At 25 cents a pound it's worth messing with, but only cast in a well ventilated area, as the arsenic (used to reduce surface tension of the lead when making drop shot) is bad stuff. There is very little tin, so the addition of some 50/50 bar solder will help your moulds fill out a lot better. I casted some 225gr (pure lead) bullets and found that with the shot lead my bullets were about 216 grain and were too hard to mark with a thumbnail. My accuracy was tolerable, but leading ahead of the chamber was too much for me.
I had no idea of the arsenic threat from shot. I have several coffee cans of mixed sized shot I was given. I figured it would make good bullets as it was high antimony trap, skeet and some hunting shot. Glad I have an exhaust fan in my shop.
Are there any good little gun shops down in Appleton? I am up in Green Bay and have found a neat gunsmith/shop in Denmark. I am always looking for another place to stop at. When I get to Oshkosh it is always an experinece to stop in at Jon's Sport Shop.
I read somewhere, I think in one of the Lyman bullet manuals, not to exceed 10% shot in an alloy. Aside from the danger of arsenic, the arsenic can cause stress cracks to form in the bullets cast from the alloy. This can unbalance the bullets, and the bullets could possibly come apart in flight or shatter on impact. 8)
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