Bullet Advice Needed
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  1. #1
    Tenderfoot
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    I just picked up my 444s and I was wondering what diameter bullets would you suggest out of the micro groove. My dad wants me to load him some slow moving cast billets over unique. And I am seeking advice on what diameter to buy I have read 429 430 431 and am not sure what would be best
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  2. #2
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    Welcome from Alabama... First thing to do is slug the bore... I think it is .002" larger then the bore you need but verify with some of the cast shooters here...
    Bart

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  3. #3
    Distinguished Master
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    Welcome from SW Ohio.

    Jacketed bullets usually work fine at 0.429.

    Cast bullets need to be 0.002-0.003" over groove diameter. You'll need to slug your rifle to find the groove diameter, but most often it's 0.429". If you want to try the 0.432", that's where I'd start.

    Microgroove is usually most accurate with jacketed. Shoot those to see your rifle's potential, then work toward that with your cast loads.

    Good luck.
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  5. #4
    Tenderfoot
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    Try the speer 270gr. Best of both worlds. Dumps deer and black bear up here in maine

  6. #5
    Gun Wizard
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    I go big and lubesize to .432 and never had any problem with leading, they chamber with no problem in my 444s

  7. #6
    Tinhorn
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    As stated, sometimes Microgroove rifling and cast boolits don't play nice together. Since I shoot a buuunnch of cast, I'll say this, many commercial cast bullets may or may not be of the best quality control, hence the Microgroove issue. Perhaps a quality bullet with powdercoating is in order?
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  8. #7
    Deadeye
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    Quote Originally Posted by HIKayaker View Post
    Welcome from SW Ohio.

    Jacketed bullets usually work fine at 0.429.

    Cast bullets need to be 0.002-0.003" over groove diameter. You'll need to slug your rifle to find the groove diameter, but most often it's 0.429". If you want to try the 0.432", that's where I'd start.

    Microgroove is usually most accurate with jacketed. Shoot those to see your rifle's potential, then work toward that with your cast loads.

    Good luck.
    I agree. In the absence of slugging your barrel, I would go with .432" diameter. Beartooth Bullets has high quality, cast bullets in this diameter.

    Dan
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  9. #8
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    .002 over bore diameter, or whatever FILLS the throat, fill the throat and it will shoot good, it takes some work with the rifle and loads to get 1-38 MicroGroove to accurately shoot cast bullets, once you figure it out, cast or jacketed will give you outstanding groups!
    I only use the 1-38 because it gives me what I desire in a hunting rifle, velocity, accuracy and versatility!
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  10. #9
    Tinhorn
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    All my T4's are .430 and I shoot .432 Beartooh cast and .429 Swift A-Frame jacketed.

  11. #10
    Gun Wizard
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    My 444s get .432" diameter bullets.

    If you slug your bore, you'll probably find a .430" groove diameter. (+/- a few ten-thousandths)
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