Difference between G1 and G7 BC

Discussion in 'The Basics, Starting Out' started by Precision_Game_85, Oct 3, 2010.

  1. Precision_Game_85

    Precision_Game_85 Well-Known Member

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    Sep 11, 2010
    What is the difference between the G1 and G7 measurement of ballistic coefficient measurements? I've seen both and the G7 number seems to be a lot lower? Reading up on ballistics and couldn't figure this out. Thanks :)
     
  2. LRSickle

    LRSickle Well-Known Member

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  3. J E Custom

    J E Custom Well-Known Member

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    In layman's terms, it means that the G1 is based on a flat based spitzer and the comparison
    between it and the new boat tail bullets will give you a much higher BC.

    The G7 model is closer to the new bullet shape and this will give you a lower BC .

    The G1 is preferred by some bullet makers because of the higher numbers . But for
    the long range shooter the G7 will be closer in calculated trajectory to your actual
    bullet drop so it is preferred for long rang shooting when calculating cold bore shots
    at long distances.

    J E CUSTOM
     
  4. FALAK

    FALAK Well-Known Member

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  5. moombaskier

    moombaskier Well-Known Member

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    +1 on JE Customs post. I have found that the G7 come ups were much closer to my actual findings using the high bc Berger bullets than the G1 values.