RepackboxMidSouth Shooters SupplyADvertise hereRotoMetals2
Lee PrecisionInline FabricationTitan Reloading

Page 1 of 3 123 LastLast
Results 1 to 20 of 45

Thread: Gas check to big?

  1. #1
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69

    Gas check to big?

    I got a new Lee double mold throw's 184 gr .313 for 303British.
    First session cast around 500 nice boolits , got out the Hornady 30 cal gas checks and they seam to big to grab shank.
    Do I have wrong checks?
    Are there different size .30 cal check s?
    I searched for ansers but post I found were a bout checks to small
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  2. #2
    Boolit Master Bad Ass Wallace's Avatar
    Join Date
    May 2005
    Location
    Australia
    Posts
    1,247
    I size my 303 boolits in a 0.316" die and use 8mm gas checks. They really crimp on.
    Hold Still Varmint; while I plugs Yer!

  3. #3
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69
    So 8 mm checks would be bigger than 30 cal Hornady I think.
    The base of my boolits is to small for 30 cal
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  4. #4
    Boolit Master mehavey's Avatar
    Join Date
    Aug 2012
    Posts
    578
    Have you actually installed the GC and sized the bullet... and the GC is still loose/comes off?

  5. #5
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69
    Not sized,
    as Cast is .3125 so I don't want it smaller in diameter
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  6. #6
    Boolit Master
    Join Date
    Jan 2011
    Location
    NE Kansas
    Posts
    1,413
    Do the bullet shanks have sharp well filled out bases or are they slightly rounded? If your bullets are shiny and not completely filled out, that could result in an undersized shank. If you are sizing the bullet to .313" and use a check intended for a .310" application, it might not be crimping the check enough to grip the shank.

  7. #7
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69
    Quote Originally Posted by Dusty Bannister View Post
    If you are sizing the bullet to .313" and use a check intended for a .310" application, it might not be crimping the check enough to grip the shank.
    I think this might be the problem. Check seems to small on outside while to big on inside at same time.
    Maybe there are checks for 312-313 . I need to check on this possible solution
    THANKS for your input
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  8. #8
    Boolit Master


    Join Date
    Apr 2017
    Location
    Minnesota
    Posts
    4,068
    Quote Originally Posted by BUFFALOW RED View Post
    Not sized,
    as Cast is .3125 so I don't want it smaller in diameter
    You have to size them, that is the only way I know to make gas checks fit. They are supposed to fit on easy, then crimp onto the shank. Sages sells both .015" thick and .017" thick 30 caliber gas checks. I've used both to good effect on .314" sized bullets.

    Try a .313" sizer.

  9. #9
    Boolit Grand Master


    Larry Gibson's Avatar
    Join Date
    Jul 2005
    Location
    Lake Havasu City, Arizona
    Posts
    18,537
    You have the right GCs. I've 2 of those moulds [older original design single cavity and newer design double cavity] and have never had a C fit problem. I agree with post #5, the bases are probably not filled out leaving the GC shank too small. Years ago when I started casting I found the same problem. I found it was not the GCs or the moulds fault but my own in not casting correctly.

    What alloy?

    Dipper or bottom pour?

    Alloy temp?
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  10. #10
    Boolit Master mehavey's Avatar
    Join Date
    Aug 2012
    Posts
    578
    Not sized,
    as Cast is .3125 so I don't want it smaller in diameter
    No GC is going to stay on until sized on.
    As MegaSuper suggests, run it through a 0.313 sizer and you'll get the GC to crimp/stay on.

  11. #11
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69
    Quote Originally Posted by Larry Gibson View Post
    You have the right GCs. I've 2 of those moulds [older original design single cavity and newer design double cavity] and have never had a C fit problem. I agree with post #5, the bases are probably not filled out leaving the GC shank too small. Years ago when I started casting I found the same problem. I found it was not the GCs or the moulds fault but my own in not casting correctly.

    What alloy?

    Dipper or bottom pour?

    Alloy temp?
    WW + 6" solder added per 20 lb pot bottom pour. droped in water as coming out of mold . turkey thermometer go's to 550 i have good results on pistol casting when needle is 1/2 way past 550 going towards 0. pretty much strait down
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  12. #12
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69
    well im going out to measure have to reply back later with more info
    THANKS
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  13. #13
    Boolit Master mehavey's Avatar
    Join Date
    Aug 2012
    Posts
    578
    The colder you (successfully) cast, the larger the eventual diameter all round.
    Be that as it may, however, you're going to have to size ( .313") those gas check on to stay.

  14. #14
    Boolit Master


    Bookworm's Avatar
    Join Date
    Jan 2016
    Location
    Central Oklahoma, on a dirt road.
    Posts
    1,153
    I had a problem with copper checks not staying on after being crimped.

    Annealing the checks prior to installing solved the problem.

    I just put the checks on a piece of ceramic tile, and heated them with a propane torch. Got them glowing, back to dead soft.

    Problem went away.
    "Varium et mutabile semper femina." - Virgil
    Man, ain't it the truth....

  15. #15
    Boolit Grand Master


    Larry Gibson's Avatar
    Join Date
    Jul 2005
    Location
    Lake Havasu City, Arizona
    Posts
    18,537
    Quote Originally Posted by BUFFALOW RED View Post
    WW + 6" solder added per 20 lb pot bottom pour. droped in water as coming out of mold . turkey thermometer go's to 550 i have good results on pistol casting when needle is 1/2 way past 550 going towards 0. pretty much strait down
    Try turning up the temp a bit more. Allow the alloy to boil back out of the sprue hole and let a good sprue for....even I alloy rolls off the mould.
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  16. #16
    Boolit Master


    Join Date
    Oct 2008
    Location
    1720 miles East of Wall Drug, North of Cooperstown, NY
    Posts
    953
    What Larry says above /\ crank up the heat and let the alloy boil out.
    ΜΟΛΩΝ ΛΑΒΕ
    Je suis Charlie
    Remember Lavoy!
    I'll cling to my God and my guns, and you can keep the "Change".

  17. #17
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69

    measurements

    the Boolits seem to be filled out well i feel. they measure .313. my bore is .3135- .314 , im concerned that starting out 1/2-1 thousandth smaller than barrel might be a problem.

    the boolit shank measures .283 from the new double mold
    the gas check inside measures .2855
    the boolit shank measures .288 on the old single mold
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  18. #18
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69
    Click image for larger version. 

Name:	IMG_20201012_082210.jpg 
Views:	16 
Size:	12.8 KB 
ID:	269565
    from new double mold
    shank measures .283
    Last edited by BUFFALOW RED; 10-17-2020 at 08:42 AM.
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  19. #19
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69
    so i'm looking at the Lee sizer do i want the .313 or the .314 sizing die?
    as my barrel is .3135-.314
    seems like the boolit should be .314 or biger before sizing or im i thinking wrong here?
    THANKS FOR ALL Y'ALLS HELP
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

  20. #20
    Boolit Bub
    Join Date
    Oct 2008
    Location
    SW MO.
    Posts
    69
    Click image for larger version. 

Name:	IMG_20201012_081836.jpg 
Views:	5 
Size:	11.9 KB 
ID:	269566
    FROM OLD SINGLE MOLD
    note the height of shank compared to double mold
    shank measures .288
    NRA Life Member
    learn to make your own black powder collect bp arms as there presently not recorded
    smokless is a fad its fading fast, helped along by obama

Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
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