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Thread: Gas checks won't crimp on

  1. #1
    Boolit Mold
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    Oct 2009
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    Gas checks won't crimp on

    I have a box of 30 cal. gas checks in a plain box. I don't know who made them but they are pretty old. I can not get them to stay on my Lee cast bullets. Does anyone have an idea why? I would make someone a deal on them if they can use these. There are probably a 1000 in the box and I would sell them for $15.00 shipped.
    Ripper90

  2. #2
    Boolit Buddy pistolman44's Avatar
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    They are probably old Lyman brand. I had the same problem until I switched to Gator brand. They crimped on tight.

  3. #3
    In Remembrance


    DLCTEX's Avatar
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    Anneal them and they'll probably stay tight.

  4. #4
    Boolit Grand Master
    Ben's Avatar
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    Have you measured the g/c shank dia. of your bullet.

    Once you have that measurement, check the dia. of the inside of the g/c, you'll probably find your problem once you do this.

    Ben

  5. #5
    Boolit Master MGySgt's Avatar
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    Years ago - casters with the Lyman checks would take a chisle and press down on the cup side of the check in a cross fashion. this would raise a point on the inside of the check that would grab and hold to the GC shank of the boolit. The raised portion on the outside would be smoothed out during the sizing operation.

    they also put a touch of crazy glue on the inside of the cup and glue the GC to the boolit base.

    Both work and the checks would not fly off on thier way to the target.
    Big Bore = 45+

  6. #6
    Boolit Master



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    Lyman used to recommend a small bit of lube, placed on the inside of the cup before seating/sizing. This works, assuming the check will be secured in the case neck but I sure wouldn't try it with the check down in the shoulder area!

    Also, if you use Krazy Glue (or some other adhesive) make up a few trial boolits first. After they dry a few minutes, deliberately try to pry the checks off. I was suprised to find that quite a few of them came off despite the glue. The glue itself was fresh, so I can only assume the lead itself is too smooth for a good "grip".

  7. #7
    Boolit Grand Master

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    I have tried vintage lyman checks with vintage molds. The checks were made of thin material. That made them undersized and unable to grab the boolit shank correctly. My conclusion is that the company never had it totally together and we are very fortunate to have more educated options in this enlightened age. Lyman has since fixed there checks and ruined their molds. Hornady makes a solid product that always works. Also people seem to be having very good luck with PatMarlins checkmakers. Accurate molds will make you whatever you want and it will be right the first time. Dont mess with old, busted stuff unless it works too good to quit (I have quite a few vintage Lyman molds that I would sooner lose the guns I use with that boolit, than the mold itself)
    Precision in the wrong place is only a placebo.

  8. #8
    Banned

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    lyman just repackages hornady checks.
    that's why they cost more.

  9. #9
    Boolit Grand Master

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    lyman just repackages hornady checks.
    that's why they cost more.
    Ouch! Are you serious? Whats your source? That is freaking hilarious!
    Precision in the wrong place is only a placebo.

  10. #10
    Boolit Master

    Reload3006's Avatar
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    I have nothing to back it up but have heard the same thing Lyman repackages Hornady checks. ?

  11. #11
    Boolit Master

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    gator will stay on. they will stay on your finger. Best and cheapest out there
    Oh ask Lyman they will tell you ---that why they mark them up 20%

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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