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Thread: Old New to me 429421 2 cav Lyman

  1. #1
    Boolit Master
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    Old New to me 429421 2 cav Lyman

    Old New to me 429421 2 cav Lyman

    So I picked up a used 429421 lyman bullet 2 cav bullet mould, Cast with it once
    Bullets just fall from the mould, it has been lapped out to .432 +-

    one hole of sprune plate is perfect centered .. other cavity is off app .05 very visible

    will the off center sprune on the bullets affect long range accuracy 44 mag . 444 marlin (rifle)

    it has the thin lyman sprune plate
    ????

    leave it or
    make a new sprun plate . with the holes centered ?

    Thanks

  2. #2
    Boolit Master bruce381's Avatar
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    good question i would shoot it first maybe ok for you

  3. #3
    Boolit Master

    pworley1's Avatar
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    That is my favorite mold for the 44 mag. Both of the holes in my mold are off about the amount you mention, so I don't know how well one would shoot it the hole was centered.
    NRA Benefactor Member NRA Golden Eagle

  4. #4
    Boolit Master AnthonyB's Avatar
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    IMO, don’t worry about it. A few years ago one of the big things to do was offsetting the screw plate so the hole was on the edge of the bullet base to help produce a “better” base. I could never tell a difference.
    Tony

  5. #5
    Boolit Master
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    KISS principal here as in most things. Cast a quality of bullets, seperate the bullets centered sprue hole and off center sprue hole, work up a load with the centered sprue hole ones that is accurate then try the off center sprue hole ones with the same load.
    Be reasonable and fire more than one group with both. If there is a slight difference ask yourself if you are a good enough field shot to tell the difference and then be concerned if you are that good remembering most don't take a bench rest into the field to hunt, plink and blast.
    Think about it.
    BTW, before anyone gets their feathers ruffled I used KISS as Keep It Super Simple, not anything else. Occam's Razor principal so to speak.
    Last edited by 44MAG#1; 07-09-2022 at 09:48 AM.

  6. #6
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    The cheapest thing to try if it bothers you is a 2 cavity mold rebuild kit from Lyman. New sprue plate and replacement screws.
    [The Montana Gianni] Front sight and squeeze

  7. #7
    Boolit Master wilecoyote's Avatar
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    I've been using alu molds only for more than 20 years.
    this will be my first iron, bought 2nd hand after reading this tread.
    before I start/try to cast, are there key points of difference in use?
    Food is overrated. A nice rifle is way more important.
    Rob

  8. #8
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    Warm up times differ you will not have as quick a cycle time nor as long of a cool down when waiting on your sprue puddle to cool. Be very judicious in keeping it oiled as I believe it would rust much quicker in Venice. I don't know what you are shooting it out of, but would try it both bare and with checks if it is out of a handgun.
    [The Montana Gianni] Front sight and squeeze

  9. #9
    Boolit Master wilecoyote's Avatar
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    ...I've a pair of 29s and a .444 lever, in case I would try some beagling for the .444,
    but I will see if on Lee molds (I think I have all their .429/.430 line) or on this new entry.

    (yes, Venice is a true rust nightmare, but in Ballistol I trust ).
    thanks for the reply !
    Food is overrated. A nice rifle is way more important.
    Rob

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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