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Thread: Gas check install

  1. #1

    Gas check install

    I just ordered a 314 Lee sizer I need 312 bullet will I be able to install gas checks with this setup or will it slip through as you can tell I just started loading cast and have had nothing but trouble so far blow back leading at the end of the barrel all kinds of soot

  2. #2

    JonB_in_Glencoe's Avatar
    Join Date
    Mar 2010
    Land of 10,000 Lakes
    welcome to the forum.

    I'm not sure I am understanding, but when you size a boolit in a .314 die, it should come out .314 assuming it was at least .314 or larger before sizing. If you need a .312 boolit, then you need a .312 die.

    Installing a GC on a boolit using a Lee die will require the resistance of a boolit being sized down. If you have a boolit that starts out smaller that the diameter of the sizing die, there won't be enough friction for the action to properly seat and crimp a GC.

    I usually don't criticize grammar, but when you just type words with no punctuation or breaks, and then attempting to get several ideas or details across, it's challenging for the reader to understand your situation.
    Good Luck,

  3. #3
    Boolit Master
    toallmy's Avatar
    Join Date
    May 2015
    easternshore of va.
    I think you need a .312 lee sizing die . Or are you going to size the boolits to .314 to shoot out of a .312 bore ?

  4. #4
    Boolit Master

    Soundguy's Avatar
    Join Date
    Oct 2016
    N Central Florida
    .......and, does your boolit have a gc shank?

  5. #5
    I'm A Honcho!

    DukeInFlorida's Avatar
    Join Date
    Oct 2009
    East and South of you
    Use a very soft fishing weight type chunk of lead , put some lube on it, and using a wooden dowel, push it or tap it through your barrel. Use caliper or micrometer, and measure the largest diameter on the lead plug you get. Your sized boolits should be .001 to .002 OVER that plug size. If your mold drops at .309, you'll never get them any larger than that. If your mold drops at .314, then you'll be in luck to reduce it to anything less than that. Buy a sizing die for .001 to .002 over the plug diameter you get. Hope this assists you and others.

    NRA Life Member
    NRA Certified Metallic Cartridge Reloading Instructor

    Author of a book on reloading

  6. #6

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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