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Thread: Core molds

  1. #1
    Boolit Master
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    Core molds

    Do they still make core molds????
    I have a few Lyman and one Ideal.
    I've looked on the web to see if they are still being made with no luck.

  2. #2
    Boolit Master

    rancher1913's Avatar
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    corbin makes them, btsniper makes them, and I believe noe makes them. your googlefu is very weak padowan
    if you are ever being chased by a taxidermist, don't play dead

  3. #3
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    JonB_in_Glencoe's Avatar
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    I don't believe Lyman makes them anymore.
    If you are searching for a price, In January, I sold a couple single cavity Iron Adjustable Core molds in S&S, they looked like they were made by Lyman, but didn't have any markings on them. one sold for $30, the other sold for $22. If you need more details/photos, Search for the thread in "Completed Deals".
    ~~~~~~~~~~~~~~
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  4. #4
    Boolit Master
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    Thanks.
    I am trying to find out what they sell for.
    Saw one on evil bay.
    Went for crazy money.

  5. #5
    Boolit Buddy
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    There were two on ebay earlier this month, they sold for $30 and $36.

  6. #6
    I got frustrated finding one at a decent price so I'm attempting to make one. Got a 2 cav mold blank to start with and a 0.185 reamer.

    Anyone have any advice on how far down to drill? Should I just make it as long as possible and cut to weight or would it be reasonable to shoot for a 45 grain slug so they can go right into the jacket? I have no idea how deep to make the cavities.

  7. #7
    Boolit Master

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    Charts for calculating weight of cores are here. http://www.castboolits.gunloads.com/...LLY-Be-Helpful
    Post #8 is where Gitano helped a lot. You still have to do some math.

    I have cut a few core molds on my mill. My best results are from placing a piece of paper between the mold blocks. The sticky notes handy are .003 thick so I call X center .6258*+ .0015 = .6273" from the edge of the block.

    *measure your block, and spacer paper.

    If you happen to be in driving distance, stop by. I will set it up you can click "cycle start"
    Last edited by clodhopper; 06-01-2020 at 09:01 PM.
    To lazy to chase arrows.
    Clodhopper

  8. #8
    That's perfect Clodhopper! Not sure how good of a product I can make with my super cheap Chinese Harbor Freight drill press

  9. #9
    Boolit Master

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    You could drill holes ok, but if the holes are not centered on the parting line of the blocks the cores do not want to fall out.

    Don't mount the blocks on the handles until after drilling the cavities. The fasteners are cleverly designed to not come back out without a struggle.
    To lazy to chase arrows.
    Clodhopper

  10. #10
    So, what's the purpose of the paper? Wouldn't that slightly increase the volume of the cavity?

  11. #11
    Boolit Master

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    The paper gives .0015 fudge room on both sides of center. So if your hole is off center just a little bit, the casting will still fall out of the mold.

    When you remove the paper the cavity is reduced in volume.
    To lazy to chase arrows.
    Clodhopper

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