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Rate of Twist for 308win

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Unread 09-07-2008, 07:24 PM
Bronze Member
Join Date: Jul 2008
Posts: 44
Re: Rate of Twist for 308win

In my Rem 700 .308 with a 1:12 twist, I can handle 165, 168, 178, and 180 g. bullet weights with sub-moa accuracy. I tried 150's the other day and they were grouping over 1 moa on me, so I know my barrel doesn't like the light-weights. I haven't tried 110 V-maxs, but that is just too light of a bullet for me to be using with that twist. Bench rest guy I know is using a 1:18 twist for a 30BR and he's getting around sub-moa. Each particular rifle is picky.
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    Unread 09-07-2008, 07:38 PM
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    Join Date: Sep 2007
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    Re: Rate of Twist for 308win

    My shilen select match with a 12 twist works awesome with 150 and 155 noslers... better than half moa anyday. (I dont use heavier bullets because 150 gr. is more than enough for silhouettes.)

    Joe from Old Mexico.
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    Unread 09-11-2008, 05:13 PM
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    Join Date: Jan 2003
    Location: The rifle range, or archery range or behind the computer in Alaska
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    Re: Rate of Twist for 308win

    The 1-12 twist will work well with 150's up to the 190 SMK. A sweet spot for the 12 twist at 308 velocities is the 178 AMAX and 180 SMK. The original green hill formulas put the 12 twist at the 168. Modern twist calcs show a bigger bullet such as the 178-180. Shoot em all and settle on the best one for YOUR barrel.
    Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.
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    Unread 09-12-2008, 12:37 AM
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    Re: Rate of Twist for 308win

    For target shooting I got 175grain SMKs to pattern between .7-.3" depending on me.

    For hunting I got 168 Barnes XXX to park at about .5"

    The 180grain stuff I have yet to get to work out of my 1:12 Rem700P.

    Haven't tried any of the smaller stuff as I've gotten these to work really well.
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    Unread 09-12-2008, 08:20 AM
    Platinum Member
    Join Date: Nov 2005
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    Re: Rate of Twist for 308win

    I shoot 150 grain Accubonds very accurately with a 1:14 twist. I have not tried the 165 grainers because I was nervous about their length.

    the 150's are 1.230 and the 165's are 1.308 long.


    Just read this thread on the 208 AMAX:

    208 AMax in 1/12 twist 308Win, Range Report

    Last edited by edge; 09-12-2008 at 08:39 AM. Reason: link added
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    Unread 09-12-2008, 10:06 AM
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    Location: Falls Church, VA
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    Re: Rate of Twist for 308win

    Thanks for all the info everybody! Keep it comin'!
    I'm not gonna shoot here. I'm gonna shoot waaaaaaaay over there!
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    Unread 09-17-2008, 11:03 AM
    jmj jmj is offline
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    Join Date: Sep 2008
    Posts: 7
    Re: Rate of Twist for 308win

    Years ago in competitive benchrest the "standard" twist rate for a 308 shooting the 168 grain matchking was 1 in 14. That was considered the ragged edge. Some had success using the 1 in 15 but most didn't. Those shooting the 180 grain were using the 1 in 12. I never heard of anyone having any accuracy problems using 180 grain matchkings from a 1 in 12 twist but that can also be considered to be the ragged edge of stability/accuracy. Just keep in mind that all barrels were stainless steel and stress relieved. Shilen barrels currently recommends a 1 in 12 twist rate for 170 grains or less.
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