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Thread: What does this number mean on old molds?

  1. 07-17-2021, 10:12 AM #1
    Stopsign32v
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    What does this number mean on old molds?

    Bottom right

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  2. 07-17-2021, 10:16 AM #2
    clintsfolly
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    Block number to keep the half’s form getting switched
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  3. 07-17-2021, 10:54 AM #3
    1Hawkeye
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    Quote Originally Posted by clintsfolly View Post
    Block number to keep the half’s form getting switched
    And the number of molds cut with that cutter.
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  4. 07-17-2021, 11:03 AM #4
    StuBach
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    What they said
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  5. 07-17-2021, 12:46 PM #5
    Stopsign32v
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    Ok good, just needed to know so I can know
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  6. 07-19-2021, 11:33 AM #6
    Taterhead
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    Quote Originally Posted by clintsfolly View Post
    Block number to keep the half’s form getting switched
    Quote Originally Posted by 1Hawkeye View Post
    And the number of molds cut with that cutter.
    I'm only part way through my coffee today, but these two items seem to be mutually exclusive.

    The former implies a unique number for each pair, but the latter implies a common number fir all halves in a batch.

    I'm curious too. Anyone with a modern Lyman block will encounter several markings. The date is obvious, but I too wonder what the others signify.



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  7. 07-19-2021, 04:03 PM #7
    fc60
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    Greetings,

    One of the numbers stamped on Ideal/Lyman blocks was the "Cherry Number". i.e. the number of the cutter that formed the cavity.

    http://castpics.net/dpl/index.php/th...old-number-faq

    Cheers,

    Dave
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check