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Thread: gas check

  1. #1
    Boolit Bub
    Join Date
    Aug 2012
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    58

    gas check

    new to casting. is there a +/- tolerance in the diameter of gas check to diameter of bullet ? do they have t be the same? IMAGINE THEY ARE THE SAME GOING THROUGH THE LUBE A MATIC. thanks for the info. CJ

  2. #2
    Boolit Master
    Outer Rondacker's Avatar
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    Mar 2014
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    The Adirondacks
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    1,877
    CJ checks are the same size as the cal. Guys have had to flare some to work on different moulds. So if you are shooting 308 you would use 30 cal. 223 would be 22 cal. Hope this helps.

  3. #3
    Boolit Bub
    Join Date
    Aug 2012
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    58
    got a sample pack for 308 ,,of different thicknesses, will the thicker checks create a rounded bottom on bullets? does that matter? TKS. CJ

  4. #4
    Boolit Master
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    I think your reading into it to much. The only time thickness mattered to ME was if it would hold on the bullet. I do not think it matters. With that said give it a few hours I am sure others will jump in and tell us both the real answers.

  5. #5
    Boolit Buddy
    Join Date
    Apr 2014
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    Bartlesville, Ok
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    I imagine thickness coming into play more with the shank size, but thats not a voice of experience.

  6. #6
    Boolit Master
    Join Date
    Jan 2011
    Location
    Prineville, Oregon
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    521
    As long as the check is made of thick enough material to squeeze down and grip the shank there is quite a lot of tolerance in size for good results. The real PIA is the "too small" check or "too large" shank that gives an overtight fit -- those can take a lot of effort to get them on straight (you'll find a bunch of different strategies posted in the "gas checks" forum if you have that problem). What you are after is a check that goes on easy but grips tightly after going through the sizer. If it goes on easy but doesn't grip you just need a thicker check (or some folks have resorted to superglue at this point).

  7. #7
    Boolit Master
    toallmy's Avatar
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    May 2015
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    easternshore of va.
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    Contact Sage's Outdoors he will fix you up with what you need , just tell him what mold you are using ,he is a very helpful gentleman . 256-492-5158 / www.sagesoutdoors . Com

  8. #8
    Boolit Bub
    Join Date
    Aug 2012
    Posts
    58
    contacted sage .no reply,, what thickness gas check for rcbs 45-405 molded bullet .458 dia. thanks

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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