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Thread: What size copper roll to start stamping gas checks out of?

  1. 01-08-2017, 07:51 PM #1
    dale12899
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    Smile What size copper roll to start stamping gas checks out of?

    hi i'm new to cst boolits and need some info on the production of gas checks.
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  2. 01-08-2017, 09:54 PM #2
    Ben
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    What caliber ?
    What is the shank dia. of the bullet you want these checks to fit onto ?
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  3. 01-09-2017, 05:02 PM #3
    dale12899
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    I'm casting .308 diameter bullets for my 30-30
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  4. 01-15-2017, 10:47 AM #4
    S.B.
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    Are you asking for a thickness in .000"s?
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  5. 01-15-2017, 11:15 AM #5
    dragon813gt
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    Quote Originally Posted by dale12899 View Post
    I'm casting .308 diameter bullets for my 30-30
    I sure hope they're larger than .308". And what is the diameter of the gas check shank?
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  6. 01-15-2017, 11:45 AM #6
    JonB_in_Glencoe
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    Dale, welcome to the forum

    Quote Originally Posted by dale12899 View Post
    What size copper roll to start stamping gas checks out of?
    I'd start with .010"
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  7. 02-09-2017, 10:34 AM #7
    6622729
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    It depends on the shank diameter. I'm using .015 copper. You need to do the math. The shank diameter plus twice the thickness of the copper you want to use must be a couple or several thousandth's greater than the bore you're trying to fire them from. So, a typical shank diameter for a .308 GC style bullet might be .284. So, .284+.010+.010 comes out to .304. Way too thin when you're looking for something around .311 when you're done. They'll never lock on. So, measure the shank and then choose your GC material thickness. I can tell you a common commercially available 30 caliber gas check is going to be .014 or thicker.
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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