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  1. #1
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    Which Twist Rate

    im in the market to replace my barrel. i have no idea what twist rate my barrel is. i shoot whatever i can get. 55 gr to 69 nato. i dont shoot matches with this gun and dont hunt. just defense and target practice. what would be the best twist reate for me. middle of the road 1in8? is there a certain bullet weight for a certain twist.
    55 to 69 for a 1 in 9 etc
    thanks for any help jason
    Last edited by Iraqgunz; 06-09-10 at 05:23.

  2. #2
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    1/7 Twist rate is what I use I can shoot 55 grain up all the way to 77 smk.
    Last edited by Thomas M-4; 05-19-10 at 12:52.

  3. #3
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    1/7 is the only twist anyone needs. everybody has their own theories/thinking on these things, but the fact remains. 1/7s will stabilize 45gr HPs, all the way up to 80gr SMK.

  4. #4
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    awesome 1 in 7 it is thanks you guys are the best

  5. #5
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    I've got both and the 1/8's are a J&T bull barrel and one is a Lilja. They are literal tack drivers with lots of the "surplus" ammo I have fired through them. Haven't fired the Lilja barrel much as I just recieved it several days ago but the J&T barrel will shoot well under an inch.
    What ever one you get a good deal on should be sufficient for your stated use.
    WW

  6. #6
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    Quote Originally Posted by bkb0000 View Post
    1/7 is the only twist anyone needs. everybody has their own theories/thinking on these things, but the fact remains. 1/7s will stabilize 45gr HPs, all the way up to 80gr SMK.

    FACT. I've owned 1/7, 1/8, and 1/9. The 1/9s were subpar for various reasons. 1/8 was fine, but I stopped using the rifle for a long time and got rid of it. 1/7 will shoot anything you feed it, usually more accurately than you.

    Anyone who tells you that 1/9 is fine, is just trying to justify to their self, that it was ok to purchase a subpar piece of kit.

    If there were any real merit to the 1/9 twist rate, more high end makers would be using it.

  7. #7
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    We are talking about a 16" barrel, right?
    Last edited by MistWolf; 05-25-10 at 20:18.

  8. #8
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    1:7'' would be ideal.

    However, a 20'' HBAR with a 1:9'' twist, is pretty damn accurate with 55 gr. rounds.



    BTW: Who makes 80 gr. SMK? Does the extra 3 gr. make a difference?
    We miss you, AC.
    We miss you, ToddG.

  9. #9
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    Quote Originally Posted by bkb0000 View Post
    1/7 is the only twist anyone needs. everybody has their own theories/thinking on these things, but the fact remains. 1/7s will stabilize 45gr HPs, all the way up to 80gr SMK.
    go with the 1:7

  10. #10
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    1x9 is just useless IMHO.
    Would you clarify for me, sir, as a man of significantly more experience than I, what you precisely mean by "useless".

    Do you mean "useless" in the sense of "There's nothing a 1/9 can't do that a 1/7 or 1/8 can do just as well, if not better, and those twists support heavier bullet weights therefore when you have a choice, there's no reason to choose 1/9".

    Or do you mean "useless" in the sense of "even when using bullets within a 1/9 barrel's usable range (generally believed to be 55 to 69gr IIRC) there is something inherent about the 1/9 twist that compromises accuracy and/or performance".

    I ask because I am a member of the "I wound up with a Bushmaster because I got an amazing deal on it and went about fixing most of it's problems, but I'm still tied to this 1/9" barrel" club (long name I know ) and wish to know if I'm as okay with my BM with it's proper bolt, extractor, receiver extension, staking, feedramps and lower parts kit as I believed (accepting that bullet weights over 69gr are inappropriate for my barrel).
    Last edited by ChicagoTex; 06-08-10 at 04:32.

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