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hobbles,
Are you using an aluminum or steel mould? The aluminum mould heats up pretty quickly and casts good balls. Those wavy lines indicates the mould is not up to temperature. You lead is probably hot enough, or it would not pour. I preheat my steel moulds by placing them near the heat source. I pour the mould full and let it sit a minute or two to transfer heat to the mould. I do that a time or two and then the mould is hot enough for the balls to fill out properly. If your mould gets too hot, the balls will have a frosted appearance. Hope this helps.
Adam
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Adam Helmer
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