Up to this point, all publicly offered small arms trajectory programs have treated a projectile as an inanimate lump with only three degrees of freedom used to calculate trajectory (windage, elevation, and range) the projectile’s movement in relation to its line of flight isn’t accounted for. Quite simply, " Degree or Degrees Of Freedom” is a physics term for actions or responses of an object that are independent of each other.
The use of Drag Coefficient and the calculation of Aerodynamic Jump enable the Hornady 4DOF ® Ballistic Calculator to be the most accurate trajectory calculator commercially available. The Hornady 4DOF ® also accurately calculates angled shots by accounting for important conditions that current programs overlook. Additionally, it is the first publicly available calculator that will accurately determine the correct vertical shift a bullet experiences as it encounters a crosswind referred to as Aerodynamic Jump (AJ). The Hornady® 4DOF ® (Four Degrees Of Freedom) Ballistic Calculator determines trajectory solutions based on projectile Drag Coefficient (not Ballistic Coefficient), combined with exact physical modeling of the projectile and its mass and aerodynamic properties.
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