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? on casting

kms1961kms1961 Member Posts: 391 ✭✭✭
edited September 2009 in Perry Shooter Competition Shooting and Reloading Forum
Hi all i was melting wheelweights down al was going great then had a batch that turned the top to a purple magenta coller was like a scum on top, skimmed and fluxed but just came back. did i maybe melt a zinc one down? never have seen this before. thanks kevin
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Comments

  • bpostbpost Member Posts: 32,669 ✭✭✭✭
    edited November -1
    From my experience what you have is two conditions. One, it is way too hot in your pot and two you have some cadmium impurities.

    Drop the temp in the pot and reflux it a couple of times. I found the cadmium impurities make a grainy bullet when casting, but they still shoot fine. It is important to drop them on a soft cloth to prevent fracturing before they cool. After they cooled and were sized I noticed no difference.
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  • kms1961kms1961 Member Posts: 391 ✭✭✭
    edited November -1
    thanks i will try that as said first i hve ever seen of this. kevin
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  • jonkjonk Member Posts: 10,121
    edited November -1
    I've seen what you describe with pure lead but never with wheelweights. Some weights are pure lead. How hard is your bullet? Can you nick it with a fingernail?

    If they are filled out and not too soft I'd not worry about it.
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