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  1. #1
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    Default Pro Amm 150gr 7x64 Balistic info

    I've tried Google and searching here.

    Could only find this link posted before: http://admin.denel.co.za/uploads//Ri...Ballistics.pdf

    But that chart doesn't show SD or BC for this ammo.

    Anyone that can help please?

  2. #2
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    Default Re: Pro Amm 150gr 7x64 Balistic info

    BC = 0.36 according to QL.

    S
    D is a formula and needs length and diameter. Google SD to get formula.

  3. #3
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    Default Re: Pro Amm 150gr 7x64 Balistic info

    Sorry, thinking of twist rate. Formula below but calculates SD = .266 for 150gr bullet.

    https://www.vcalc.com/wiki/MichaelBa...tional+Density

    Sectional Density (SD): The value is returned as a real number
    The Math / Science

    The mass is converted to pounds and the diameter to inches. The formula for sectional density is
    SD = M/d˛
    where:

    • SD is the sectional density
    • M is the mass of the projectile or bullet in pounds
    • d is the diameter of the projectile or bullet in inches.

    This calculator automatically converts grains, grams and other mass/weight units to pounds, and millimeters and other length units to inches. The resulting answer is provided with no units.
    The sectional density as applied to a bullet is slightly different than the sectional density definition as applied in a general physics context. Sectional density in a general physics context is defined as mass per cross-sectional area. Sectional density is approximated as mass per diameter squared.

  4. #4
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    Default Re: Pro Amm 150gr 7x64 Balistic info

    Quote Originally Posted by driepootx View Post
    BC = 0.36 according to QL.
    Thanks driepootx.

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