Why did Berger change their twist rates?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Siso, Aug 19, 2009.

  1. Siso

    Siso Member

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    When I had ordered my rifle, Berger's recommended twist for a 130gr 6.5mm VLD was 1 -9". Now it's 1 -8"? How often were the 130's not working in the 1 - 9" to need the increase in the recommended twist?
     
  2. J E Custom

    J E Custom Well-Known Member

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    I'm not sure why they should /would change the rate of twist for the 130gr bullet
    because the recommended twist for the 6.5 is 120gr=1 in 10, 140gr = 1 in 9 twist,and
    anything over 140gr should need a 1 in 8 twist.

    I don't think you will have any problems with the 1 in 9 twist at all . in fact I think you chose
    the right twist for your barrel. and the 120s,130s,and 140s should do well.

    Just My opinion

    J E CUSTOM
     

  3. apexmtnman

    apexmtnman Well-Known Member

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    I have an old box of 140 grain Berger 6.5's and they say 1 in 9 twist or faster with a .640 BC. I also have a new box of 140's that say 1 in 8 twist or faster with a .595 BC. So I guess they have changed their suggested barrel twist.
     
  4. su37

    su37 Well-Known Member

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    Berger really missed me up on this.

    I ordered a 1/9 barrel to shoot 6.5 140's and bought 500 bullets to start me out with.
     
  5. J E Custom

    J E Custom Well-Known Member

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    I still think you will be OK with the 1 in 9 twist especially if your velocity is in the upper
    range of the 6.5.

    J E CUSTOM
     
  6. su37

    su37 Well-Known Member

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    I wish, they aren't working out.
     
  7. J E Custom

    J E Custom Well-Known Member

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    Sorry to hear that !!!!!!!!!

    You may have to cut your losses and switch to a conventional bullet .

    Try a 130 gr accubond and I think you will be pleased.

    Just in case there is another problem keep the Berger's until you are happy with another bullet
    and then sell the Berger's.

    J E CUSTOM
     
  8. Ernie

    Ernie SPONSOR

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    What will the barrel be chambered in?
    My guess is that the 130's will do just fine.
    You won't know until you try.
     
  9. Siso

    Siso Member

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    It's a 1-8.5 and so far it's shooting the 139 scenars fine. But then again it's still warm out. If the twist was border line I wouldn't think that I would have issues unless it's cold.
     
  10. elkaholic

    elkaholic Well-Known Member

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    I shot 130 accubonds in a 10 twist under 1/2 moa consistently. Don't give up on the 140 bergers until you try seating them INTO the lands up to .020." I have a 6.5 sherman with an 8 twist and they won't stay under an inch unless I seat them .020 into the lands and then they shoot 1/2" or better......Rich