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Thread: Seating a gas check

  1. #1
    Boolit Master


    frkelly74's Avatar
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    Seating a gas check

    I have been doing some powder coating for 8 mm and 30 cal boolits and Have had trouble getting gas checks onto the shank of the boolit squarely. I , this last time , used my 225 sizing die in my press to stop the boolits and then pushed the gas check onto the shank with the 30 cal pusher. They snap on and go square without any damage.

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    I am going to apologize in case this is someone elses idea, but it dawned on me so I wanted to pass it on. The checks crimp on firmly when pushed through an appropriate size die.
    Quis Quis Quis, Quis Liberat Canes

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  2. #2
    Boolit Master Bazoo's Avatar
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    Thanks for sharing. I've seen where folks will use their seat plug to seat gas checks. I use the gas check seater for the Lyman 450. Before I was just giving them a rap on the bench or when a whack with a hammer handle, but it seated them crooked. I would get occasional offset driving bands.

  3. #3
    Boolit Master Tripplebeards's Avatar
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    I press mine on with my fingers and tap each one on the table or hard surface till they look almost flat. Then I pull off the thinly shaved lead strip that the GC Scraped off with my fingernail. If I don’t the lead smears onto the GC and gap between it and the first lube groove. From there I run the boolit through my lee sizer. After a couple hundred I have blisters on my fingers but it seats the GC even and I get great accuracy. Just a PITA to do so.
    Last edited by Tripplebeards; 09-17-2020 at 11:23 PM.

  4. #4
    Boolit Master The Real Doc Holliday's Avatar
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    Quote Originally Posted by Tripplebeards View Post
    I press mine on with my fingers and tap each one on the table or hard surface till they look almost flat. Then I pull off the thinly shaved lead strip that the GC Scraped off with my fingernail. If I don’t the lead smears onto the GC and gap between it and the first lube groove. From there I run the boolit through my lee sizer. After a couple hundred I have blisters on my fingers but it seats the GC even and I get great accuracy. Just a PITA to do so.
    I used to do the same thing and with arthritis in every joint.... they really start to hurt doing this. I finally got the harbor frieght arbor press and now it is quick easy and doesnt hurt my fingers. Then I run them backwards through the sizing die and they are on there for good.

  5. #5
    Boolit Buddy

    Txcowboy52's Avatar
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    Great idea! Thank you for sharing!!
    Keep your powder dry and watch your six !!

  6. #6
    Boolit Master
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    I have a 30 cal. mold that they fit tightly on. I run the crooked ones into the sizer, withdrawal the ram a bit and then give it a light rap. Squares it up nicely before it crimps. I also have a 30 cal. gas check seater from NOE that I have not used. Might be just the thing if I need to PC my boolits. So far BLL tumble lube has worked into the 1650 fps.
    Last edited by Cosmic_Charlie; 09-29-2020 at 07:34 PM.
    Boolit Master? Boolit Straw Boss is more like it.

  7. #7
    Boolit Master



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    I also like and use the NOE.

    I was thinking a small arbor press might be a workable solution as well. Thick piece of steel with a hole drilled to accept top Punches for nose shapes would be a easy thing to do.

    For now the NOE is working great!!

    Also powder coat... Sift off the bullets more and this will Knock down the thickness of the coating. Yet still have plenty to make the jacket. Your checks will Seat easier.

    If this is t acceptable, set checks first TBEN POWER COAT and crimp as you size.
    NRA Life member REMEMBER, FREEDOM IS NOT FREE its being paid for in BLOOD.
    Come visit my Utube page!!

    https://www.youtube.com/user/cwlongshot

  8. #8
    Boolit Master
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    i do that if i dont want to size my boolits

  9. #9
    AKA: GRMPS Conditor22's Avatar
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    this type of "jig" really helps when doing 223's and you have big hands

  10. #10
    Boolit Master


    frkelly74's Avatar
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    NOW There's a better mouse trap. You are in production!
    Quis Quis Quis, Quis Liberat Canes

    /////////BREAKING NEWS////////////
    Millions and millions of American shooters and sportsmen got up, went to work, contributed to society in useful and meaningful ways all over the nation and shot no one today! How do they controll themselves?? Experts Baffled....


    I LIKE IKE

  11. #11
    Boolit Buddy
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    I've used the rounded heads of carriage bolts to slightly "bell" gas checks that won't snap on. Run 'em through the sizer and they snug up just fine.

  12. #12
    Boolit Buddy
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    I've used the gas check bell setup by NOE, but I can't figure out a good way to get the checks off the piece that bells them easily. Those suckers get stuck on there good

  13. #13
    Boolit Buddy
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    i seat the gas check on the bullet the normal way, in the rcbs lube press. then i pc the bullets. i have no lube in my press and/or dies.

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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