22 GT cartridge

Discussion in 'Small Stuff--22s, 20s, and 17s' started by HABU 1, Jan 11, 2020.

  1. HABU 1

    HABU 1

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    I have been looking at a new .22 calibre varminting round, and i have decided on a .22GT . Im currently running a .22 BR 1-14 twist for 40g. Have had a 1-9 75g Amax in the past , good stick . New build is BAT TR and proof 1-8 @ 20" . Finished truck rifle. What im asking is how do i get a die set built for .22GT. I only have 6mm GT brass , but i need to send 3 pieces to whidden for custom dies. What are my options to make brass ie, .22GT to make final reamer print.Do i buy 6mm GT die and appropriate bushings, then have a .22 full length sizer from whidden . Need to get brass, bullet combo sorted ie, 80g ELD or 77gTMK in a .22 GT CASE for reamer print manufacture. Cheers for your time Lee ENGLAND
     
  2. linebaugh

    linebaugh Silver $$ Contributor

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    6 GT bushing die with .22 cal inserts. Good call on the caliber BTW as I am going to go that route when I burn this bbl out this season. Please let us know how it goes.
     
  3. Skunce

    Skunce

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    Whidden can also build you a die from your reamer print. I you prefer to have a die built from fired brass. I've used Hornady universal neck dies to neck brass down before. They are inexpensive and will size the full length of the neck down to the neck shoulder junction.
     
  4. Dale264

    Dale264

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    I’ve been waiting for someone to start up a post like this! Please keep us posted in the future how this works out.
     
  5. HABU 1

    HABU 1

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    Hi there, if i were to use hornady 6mm Gt Dies, what bushings would i need. Alpha 6mm gt brass is 0.01275" neck thickness that leaves 4 thou on 0.273 for aGA reamer. Any idea's fellas thanks for your time and post , keep them coming , cheers Lee
     
  6. linebaugh

    linebaugh Silver $$ Contributor

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    bullet diameter plus brass thichness and add .003. Best to size down a smallntest group first and get a "loaded" outside neck diameter before you go whole hog. This may require buying an extra bushing but is cheap insurance of getting things correct in the long haul.
     
  7. Toby Bradshaw

    Toby Bradshaw Gold $$ Contributor

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    Absolutely. The case necks will get thicker when necked down.
     
  8. HABU 1

    HABU 1

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    Thanks for your replys , regard Lee
    Only redding manufacturer full length bushing die for 6mm Gt , so its that i think and appropriate. 22 bushings, iwill need .
     
  9. HABU 1

    HABU 1

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    Called JGS and WHIDDEN now all sorted just got to wait , thanks for all replies , regards Lee
     
  10. Nightraider

    Nightraider

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    I have a 22GT reamer being ground, .257" neck with .075"fb. Should be very close to the 22x47 using varget/8208/h4895.
     
  11. Kimber.204

    Kimber.204 Gold $$ Contributor

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    Is this freebore set for a specific bullet? I'd love to run a 22GT with the 88gr ELD-M.
    Thanks,
    Ross
     
  12. HABU 1

    HABU 1

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    Hi there what bullets are you going to shoot , cheers Lee
     
  13. Evan

    Evan Gold $$ Contributor

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    .075 seems short for 90gn class. My 22BR has a 0.100 freebore, which seats the base of the 88 just above the case wall-shoulder junction. Aka a little deeper than most would consider ideal. With the shorter neck of the 22GT, you'll want more freebore for the 90 class. I bet that 0.075 freebore will be best for 69-77gn bullets that are designed for a magazine length 223.
     
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  14. Evan

    Evan Gold $$ Contributor

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    Here's the 88 seated to touch in my 100 freebore 22BR:
    20190628_205635.jpg
     
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  15. Nightraider

    Nightraider

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    It's a basic set up for my reamers. The 22x47L all have .075 so I copied that. Should still work well with the 53-95s with the neck length it has.
     
  16. sscoyote

    sscoyote

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    Fills the narrow niche between 22x47 and 22 br variants I think. Should be perfect for my next short-action XP-100 handgun build. Just got a donor too. In fact it should provide for plenty of barrel life for comps and more velocity for sniping coyotes too. Yippee!
     
  17. Justin B

    Justin B Silver $$ Contributor

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    Wonder what fps will be with a 90 class pill?
     
  18. Kratos

    Kratos Gold $$ Contributor

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    What's the rationale for this? It sounds like people are blowing up bullets even with the 22 BR, so I wonder if it will be possibly to effectively use the increased case capacity of the GT.

    edit: just to be clear, I'm asking, not arguing. I'm sure there are factors I haven't considered.
     
    Last edited: Feb 17, 2020 at 4:26 PM
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  19. linebaugh

    linebaugh Silver $$ Contributor

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    depends on bbl length. 30" would be in the 3100 range
     
  20. linebaugh

    linebaugh Silver $$ Contributor

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    I run 95s out of a 22 BR improved with a 30" tube at 3030 fps. I am having a 22 GT reamer cut because my pressure is too high and I am losing brass on the 4th or 5th firing. I want that same velocity area with less pressure and excellent accuracy, which is why I am going there. So basically this is the smallest capacity capable of doing this without pressure problems like I am having now. That's the rationale.

    As for blowing bullets. The 95 SMK through a 7 twist bartlein at 3030fps and no bullet failures that I am aware of at about 1600 rounds. I am probably not getting full BC potential at distsnce but I would guess i am close.
    I did read a report last week of someone losing a 95 bullet in flight sooo? I just started another 1500 rnd lot of bullets and I sure hope that is not an issue.

    If you intend to run the 88 eld and 90 berger vld above 300krpm its gonna be a crapshoot on bullet failure. I would suggest people stop running the 6.5-7tw and go to a 7.5. May or may not lose some BC there but losing bullets in flight is much worse.
     
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