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Tennessee Gun Owners Forums
Muzzleloader
Poured some bullets
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<blockquote data-quote="sun" data-source="post: 5082690" data-attributes="member: 8678"><p>The classic sign of zinc contamination is that the mold won't fill out.</p><p>Pure lead melts at 621.5 F.</p><p>Zinc melts at 787.2 F.</p><p>There's ways to test for Zinc using muriatic acid and to watch closely for any kind of bubbling reaction. or use a thermometer and remove the zinc before casting.</p><p>Pure lead will not react to acid.</p><p>Zinc bullets will weigh less than pure lead bullets. and will be harder.</p><p>The higher the percentage of zinc, the worse that the bullets will come out.</p><p>The fact that the OP needed to blast his heat in order to cast is an indication that too much zinc was in the mix.</p><p>The photos of the bullets shows it since they couldn't hold their shape.</p><p>Some folks have said that any more than 2% zinc can ruin the alloy and those bullets look pretty bad.</p><p>I wonder what they measure and how hard they will be to load.</p><p></p><p>[URL unfurl="true"]https://castboolits.gunloads.com/showthread.php?303230-Acid-Test-for-Zinc[/URL]</p></blockquote><p></p>
[QUOTE="sun, post: 5082690, member: 8678"] The classic sign of zinc contamination is that the mold won't fill out. Pure lead melts at 621.5 F. Zinc melts at 787.2 F. There's ways to test for Zinc using muriatic acid and to watch closely for any kind of bubbling reaction. or use a thermometer and remove the zinc before casting. Pure lead will not react to acid. Zinc bullets will weigh less than pure lead bullets. and will be harder. The higher the percentage of zinc, the worse that the bullets will come out. The fact that the OP needed to blast his heat in order to cast is an indication that too much zinc was in the mix. The photos of the bullets shows it since they couldn't hold their shape. Some folks have said that any more than 2% zinc can ruin the alloy and those bullets look pretty bad. I wonder what they measure and how hard they will be to load. [URL unfurl="true"]https://castboolits.gunloads.com/showthread.php?303230-Acid-Test-for-Zinc[/URL] [/QUOTE]
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Tennessee Gun Owners Forums
Muzzleloader
Poured some bullets
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