.243 bullet weight

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by rtv900, Oct 5, 2008.

  1. rtv900

    rtv900 Well-Known Member

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    I purchased a 243 Tikka last week. It has a 1 in 10 rate of twist. Am I correct in assuming that it should shoot a 95-100 grain bullet the best or am I mistaken? I would like to shoot a lighter weight bullet but I am not sure it will with a 1 in 10 twist. I am a novice on twist rates so any help you can give my would be appreciated.

    I am going to use the gun for coyote hunting. The gun is light and easy to carry. My other guns are to heavy to carry all day.

    Thanks for the help.
     
  2. Ridgerunner665

    Ridgerunner665 Well-Known Member

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    For 1 in 10" twist...I would stick to 90 grains and less, with 85 grains being about optimum IMO.

    Other companies twist their 243 barrels at 1 in 9 1/8" to 1 in 9 1/2"...these are better for the heavier bullets.

    That's not to say that a 1 in 10" barrel won't stabilize a 100 grain bullet....but you will have to push it HARD to get some speed (and spin) up.

    For coyotes...75 to 85 grain bullets should do great.
     

  3. johnnyk

    johnnyk Well-Known Member

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    RTV,
    Your rifle should shoot 75-90gn pretty good. I recently acquired a Winchester HVB in .243Win that shoots the 87gn great. I've tried the 65gn VMax and they hovered just under an inch but the 87gn Winchester pills printed in the .2" range. I worked up a load with the 90gn Ballistic Tip and they're hovering around .2-.3". I'm using 44.5gn of IMR4831 with the 87gn and 44.0 with the 90gn. This powder and bullet weight range also worked just as good in another .243 Win that I used to have. It was a Rem 700 (9.25" twist). Good luck. JohnnyK.
     
  4. Ridgerunner665

    Ridgerunner665 Well-Known Member

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    RTV,

    To put it simply....the longer the bullet, the faster it needs to spin...243's shooting 100+ grain bullets need at least 1 in 8" twist for optimum results...especially at extended ranges.
     
  5. rtv900

    rtv900 Well-Known Member

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    Thanks for the replies. I shot it yesterday with some 100g bullets at 200 yards. Then I shot it with some 85g at the same range and my groups were much better with the 85g.

    Thanks again.
     
  6. Dana in Montana

    Dana in Montana Well-Known Member

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    Sep 13, 2008
    I like the 85 gr Sierra (I THINK it's #1530) for deer and varmints...very accurate and deadly on deer.
    best
    Dana