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Thread: Recommended twist for a .308?

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    Recommended twist for a .308?

    Im going to get a krieger barrel for a .308 im building, and i was wondering what twist you recommend and if i should get 5r rifling on the barrel or not?

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    If your gonna shoot 190gr bullets and lighter go 1-11:25, any heavier go 1-10. I like 5r, but not a must.

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    Quote Originally Posted by tmxring View Post
    If your gonna shoot 190gr bullets and lighter go 1-11:25, any heavier go 1-10. I like 5r, but not a must.
    Tbh i dont know what im going to shoot yet, im definatley gonna be reloading my bullets, what would be the best weight/twist for shooting between 300-900 yards?

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    1/11.25 seems to be the go to twist rate for a 308. I run 155's or 175's.

    I went 1/10 on my 300WM for the 185gr Berger Juggernauts.

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    1:12 will stabilize any bullet that efficient in a 308 at supersonic speeds and then some heavier stuff, so why put more of a spin on it and lose velocity?

    If you plan on shooting subs run a 1:10, other than that there's nothing wrong with a 12.

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    Recommended twist for a .308?

    This your second post that I have seen regarding large equipment purchases (ie scope thread) so I have to give you major credit for doing your research. I would personally recommend 1-11.25. The 1-10 is fine but it shines most for the subsonics which I doubt you will be interested in. 1-12 is of course absolutely fine but my vote goes for 11.25.

    Edit: 175s are great. You will be reloading so you have unlimited possibilities. 168s are also great but do not handle the wind near as good as the 175s. I am currently making that switch right now.
    Last edited by Andy27AL; 12-08-2013 at 02:55 PM.

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    11, 11.25 are popular.

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    I am shooting 175 SMK out of a 1-10 twist 18 inch barrel and out to a 1k is no problem so it really just depends on what you want .
    Gear Junkie !!

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    Quote Originally Posted by tmxring View Post
    If your gonna shoot 190gr bullets and lighter go 1-11:25, any heavier go 1-10. I like 5r, but not a must.

    Quote Originally Posted by KYS View Post
    1/11.25 seems to be the go to twist rate for a 308. I run 155's or 175's.

    I went 1/10 on my 300WM for the 185gr Berger Juggernauts.
    This ^ I've shot 155s, 168s, 175s, and 178s all have shot 1/2 MOA or better. Latest 5-shot group with the 178s. Just a factory 700 5R barrel as well.
    Last edited by Blackops_2; 12-08-2013 at 03:11 PM.
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    I run a 1:10 on a 23" Brux . I mainly shoot the 175's and its great. The 1:10 twist gives me the option to run the real heavies if I want to but still allows me to shoot the 155s if I want to.
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    All of mine are 1/10 - 18" gas gun and a 26" bolt. They both hold sub MOA using factory FGMM 168, 175 and reloaded 155's just fine.

    If I could find some 110 grain a-max bullets I'd love to test those as well. . . .

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    I have a 1/10, but wish it was a 11.25. 11.25 gives you lots of options.

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    I have a Remington 700 Tactical, it is a 1-12". It has been cut to 18". It shoots both the 175 SMK and the 168 Hornady BTHP really well. This is a 5 shot group @ 100 with the 175's



    This is a 5 shot @ 100 with the 168's


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    Quote Originally Posted by Andy27AL View Post
    This your second post that I have seen regarding large equipment purchases (ie scope thread) so I have to give you major credit for doing your research. I would personally recommend 1-11.25. The 1-10 is fine but it shines most for the subsonics which I doubt you will be interested in. 1-12 is of course absolutely fine but my vote goes for 11.25.

    Edit: 175s are great. You will be reloading so you have unlimited possibilities. 168s are also great but do not handle the wind near as good as the 175s. I am currently making that switch right now.
    Thanks! Being only 15 i like to do my research before i purchase my products, make sure everything is going to work good together, and make sure im getting quality stuff. Could i send you my planned build and you look over it just to see that its not gonna be any bottle necks anywhere?

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    If you have a choice then always go for the 1-10 twist. 5R supposedly does not cut the bullet as much and fouls less. Whether this is true or not I see no reason not to go for it.

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    I am definitely no expert. Just put it up where some of these guys who make a living in the profession can help and critique you. You are on the right track so far. There's really no wrong way to go if you stick to all the suggestions.

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    bartlein 11.25:1 with factory 168 fgmm....
    That bitch showed up, you know the good idea fairy... god I hate that thriving thunder *unt
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    Tagging this for my own research. OP, if you are 15 and have the means to build a LR rifle, props to you.
    "Do not go onto the firing line with a Jim Beam bottle full of iced tea."
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    Order a mid twist barrel (1/11) and try a variety of different bullets by hand loading. Your gun will tell ou what it likes. My 1/11 twist will shoot 168 and 175, but shoots 155's lights out.

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    Quote Originally Posted by BIPMaster View Post
    Tagging this for my own research. OP, if you are 15 and have the means to build a LR rifle, props to you.
    Thanks! That really means alot, been spending alot on my ar recently and it got boring after i could shoot less than a quarter group @ 200 yards so i decided to build this to shoot farther and give me more of a challenge.

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    1in10 best overall twist IMHO

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    Congratulations on doing your homework man! It's good to see the next generation hard at work!

    Post some pics when you get it finished.

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    1/11.25 is great but why not go ten? On cold days with high pressure (low DA) even the 1-11.25 can start to run into stability issues with the 185 berger class bullets. It's nice to have the option.

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    Quote Originally Posted by hooyah View Post
    I am shooting 175 SMK out of a 1-10 twist 18 inch barrel and out to a 1k is no problem so it really just depends on what you want .
    Yep. I've been past 1000 shooting a 1:12 18" with 175s. I don't think the .308 is nearly as finicky about twist rate as some of the other calibers. I know a guy playing around with twist rates for fun and has had great INITIAL success with 1:8 .308 barrels but I don't know that he's reached the point of "recommending" it yet.
    He even tried a 1:4 which he would only say failed MISERABLY and he would not be trying that again.
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