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High velocity ammunition round

  • US 8,096,243 B2
  • Filed: 03/04/2010
  • Issued: 01/17/2012
  • Est. Priority Date: 03/04/2010
  • Status: Expired due to Fees
First Claim
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1. A sub-caliber bullet having long-range accuracy, comprising:

  • a forward portion, a mid-portion and an aft portion, said aft portion having an outwardly extending feature that contributes to aerodynamic stability;

    said forward portion being a first material having a first density that is in excess of 10 g/cm3 and both said mid-portion and said aft portion being of a material different from said first material and having a respective density that is less than said first density;

    said sub-caliber bullet having a length, L, to maximum diameter, D, aspect ratio, L;

    D, of at least 5;

    1; and

    a diameter, d, of said entire forward portion and of said entire mid-portion satisfying an aerodynamic equation selected from the group consisting of Power Law equation;


    d=D*(x/L)n where;

    x is a distance rearward from a nose of said sub-caliber bullet and n is a Power Law exponent that is between 0.5 and 0.75 and a Von Karman Ogive equation;


    d=D*((Θ



    (sin(2Θ

    /2))/π

    1/2)1/2
    where
    Θ

    =arccos(1−

    (2*x)/L).

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