What twist for 243 Ackley

Alabama556

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  • May 15, 2008
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    What do you think the best twist would be for a 243 ackley shooting 90-100 grain bullets? Primarily Nosler accubond’s or swift scirocco’s.

    thanks
     

    eff10mm

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    Nov 9, 2012
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    1:9 would be okay for those bullets,but I would go a touch faster just in case you choose some 100+ grain match bullets. Go for 1:8.

    mine is 1:10 and I don't run anything heavier than 87 grain VMAX's. Rebarreling this winter with a 1:7.5 to shoot 110 Sierras.
     

    reubenski

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    Jun 8, 2008
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    I built a 243AI just for hunting in 2008. 95gr SST and 87gr VMAX. I went with the classicly defined twist rate for those bullets. 1:10 but I think by today's standards it's a bit conservative. I think a 1:8 or 1:9 would work just fine. I still have it and shoot it. It does great.
     

    holy cow

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    Apr 22, 2010
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    I just had a 243 built and did a 8 twist to shoot the heavier bullets down to the 90-87 grain range. I would not do any other twist than that except a 7.5 for those range of bullet weights. I had a old box of 58 grain Winchester and was really surprised at how well it grouped them.
     

    Bully

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    Sep 30, 2014
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    1:9 would be okay for those bullets,but I would go a touch faster just in case you choose some 100+ grain match bullets. Go for 1:8.

    mine is 1:10 and I don't run anything heavier than 87 grain VMAX's. Rebarreling this winter with a 1:7.5 to shoot 110 Sierras.

    Just a "FWIW" and "It's worth exactly what you've paid for it" but an acquaintance has a 7.5 and can't shoot the 110's. The holes in the target at 200 aren't round. I'd go (and am going) 1:7 for that bullet.

    As to the OP, an 8 should do well depending on where you are.