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Thread: Twist rate in .223 barrels

  1. #1
    Join Date
    Jan 2008
    Posts
    17

    Twist rate in .223 barrels

    I'm thinking of buying an ar-15 type rifle in .223, they offer two different twist rates a 1-8 and a 1-12. What do you think is the best choice for all round use? I'll probably stay in the 50-70 gr. bullet weight. You hear some saying go 1-8, I'm just not sure!

    Many Thanks
    Paul

  2. #2
    Join Date
    Apr 2005
    Posts
    132
    The 8 twist will shoot the 52/53 grain match bullets just fine. Then if you want, you still have the option of moving up to the 69/75/80 grain bullets.

  3. #3
    Join Date
    Jun 2005
    Posts
    800

    Faster is better

    Go for the 1 in 8"; why limit yourself? The 1 in 12" will stabilize 55 grn. with no problem but once you get to the heavier bullets, you'll want the faster twist rate.
    Chino69

  4. #4
    Join Date
    Feb 2003
    Location
    Western Kansas
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    265
    Some guys seem to think that if you've got a fast twist AR bbl., you've got to shoot 69s & heavier to get any accuracy. I don't know where this got started, but it's a load of BS. A good 8-twist bbl. will shoot 52-53gr. match bullets into tiny little groups, yet still give you the option of using the heavier bullets if you want/need them at longer distances.

  5. #5
    Join Date
    Nov 2007
    Posts
    393

    Smile Fast twist 223

    I also believed I could not use 50 to 55 gr. bullets with a 1-7.8 Krieger,(AR-15). Frank White, Compass Lake, assured me they would be fine, and he was right. I now have the option of 50 to 77 gr, bullet weights. Faster is better.

  6. #6
    Join Date
    Jan 2008
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    17
    Thanks fellas, I was leaning heavy toward the 1-8, but just wasn't completely sure! Now I know I'll go with the 1-8!

    Thank You
    Paul

  7. #7
    Join Date
    Jan 2006
    Posts
    79
    My Bushmaster 16" Match Barrel is 1/9 and it shoots everything well. I can use a sandbag and make head shots at 100 yards on a IDPA target. That's with an EOTech (no magnification) and WOLF ammo. Too bad it's not a flat top. I would love to try it with handloads, a Leupold on top and a nice light trigger. You should be just fine with the 1/8 barrel.

    Enjoy your rifle.

  8. #8
    Join Date
    Mar 2007
    Location
    Advance, MO
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    253
    Quote Originally Posted by flatlander View Post
    Some guys seem to think that if you've got a fast twist AR bbl., you've got to shoot 69s & heavier to get any accuracy. I don't know where this got started, but it's a load of BS. A good 8-twist bbl. will shoot 52-53gr. match bullets into tiny little groups, yet still give you the option of using the heavier bullets if you want/need them at longer distances.
    I bet to differ. Mine doesn't handle 5x gr bullets very well at all compared to 68s and 69s and I have a 1:9"! It will handle them, but not as well as the heavier bullets.

  9. #9
    Join Date
    Aug 2005
    Posts
    445
    each and every barrel is an individual. some barrels of the exact same twist rate will shoot some bullets, and another wont. best group my 1-9" barrel has ever fired was with 45 gr bullets.

  10. #10
    Join Date
    Jan 2006
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    79
    Quote Originally Posted by tylerw02 View Post
    I bet to differ. Mine doesn't handle 5x gr bullets very well at all compared to 68s and 69s and I have a 1:9"! It will handle them, but not as well as the heavier bullets.
    5X bullet?

  11. #11
    Join Date
    Mar 2007
    Location
    Advance, MO
    Posts
    253
    50-59gr. X for a generic number as there is everything from 50, 52, 53, 55, etc...

  12. #12
    Join Date
    Jan 2006
    Posts
    79

    Duh to me

    who said old farts can't learn something new!

  13. #13
    Join Date
    Jul 2005
    Posts
    571
    Lighter bullets in a faster twist puts a real premium on the bullet quality.

    The 1:7.5 I have shoots premium bullets of any weight, but more 'standard' fare does not do well below ~60 gr.

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