223 wssm

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by cavtrooper94, Jun 10, 2009.

  1. cavtrooper94

    cavtrooper94 Well-Known Member

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    May 10, 2009
    I am far from a gunsmith so I'm asking you guys. What if a guy had a 223 Remington 700P with a 26 inch barrel. Could you re chamber the barrel to 223 WSSM and use the 1:9 twist barrel to launch 70 gr VLD's? Just wandering.
     
  2. J E Custom

    J E Custom Well-Known Member

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    Jul 29, 2004
    Good question.

    I am in the middle of an experiment using the 223 WSSM .

    My goal was to exceed 4400 ft/sec so the twist I chose was a 1 in 15.

    The 223 WSSM should push the 70 gr bullet around 3500 ft/sec so I would think
    a 1 in 10 would be about right.

    But if you go to a fast twist you may have trouble with lighter bullets over rotating.

    Kirby did a lot of testing with heaver bullets and should be able to shed some light
    on your question.

    So far the 1 in 15 has worked well with up to 64 gr bullets @ 3922 ft/sec and a SD
    of 06, The 40 gr Ballistic Tip has reached 4318 ft/sec with no pressure signs and
    accuracy is under 1/2 MOA (I hope it will end up better than that).

    J E CUSTOM
     

  3. cavtrooper94

    cavtrooper94 Well-Known Member

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    May 10, 2009
    The 223 WSSM is very fun and awesome. I bought one as soon as they came out, a little earlier actually, but I don't know why they havn't caught on more. My OOTB Browning will cloverleaf 52 gr BTHP and shoots up to a 65 grain bullet fairly decent. I believe it has a 1:10 twist, which is why I thought the 1:9 would be better for the 70gr VLD.