Get the Hornady Ballistic Calculator App with 4DOF
The new Hornady Ballistic Calculator App includes the advanced state-of-the-art 4DOF™ calculator as well as a standard BC (ballistic coefficient) calculator. It is available for free on both the Apple and Android app stores and allows users to calculate trajectories in areas without wireless connectivity. The Hornady Ballistic Calculator App is Bluetooth enabled and will toggle with select wind meters. The App also allows users the ability to create “favorites” (rifle/scope/ammunition combinations) and save them for repeated use.
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The new 4DOF™ (4 Degrees of Freedom) Ballistic Calculator has become a popular resource for those seeking more accurate trajectories, especially at extreme ranges. The Hornady 4DOF calculator provides trajectory solutions based on projectile Drag Coefficient (not ballistic coefficient) along with the exact physical modeling of the projectile and its mass and aerodynamic properties. Additionally, it is the first publicly available program that will correctly calculate the vertical shift a bullet experiences as it encounters a crosswind; referred to as aerodynamic jump. The use of drag coefficients, correct projectile dynamics, aerodynamic jump and spin drift enable the Hornady 4DOF ballistic calculator to be the most accurate commercial trajectory program available–even at extreme ranges.
Using Doppler radar, Hornady engineers have calculated exact drag versus velocity curves for each bullet in the 4DOF™ calculator library. Combined with the physical attributes of the projectiles, the 4DOF™ calculator is simply more accurate for long range hits than using BC based systems or custom drag curves based on limited data collection points.
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“Current ballistic calculators provide three degrees of freedom in their approach; windage, elevation and range, but treat the projectile as an inanimate lump flying through the air,” said Dave Emary, Hornady Chief Ballistician. “This program incorporates the projectile’s movement in the standard 3 degrees but also adds its movement about its center of gravity and subsequent angle relative to its line of flight, which is the fourth degree of freedom.”
The 4DOF ballistic calculator is used with pre-populated bullet files that include long range match and hunting style bullets. This includes Hornady ELD-X® and ELD® Match bullets along with appropriate BTHP bullets. In addition, popular long range projectiles from other companies like Sierra, Berger and more are included. To view the online, web version of 4DOF and see the projectiles available, visit www.hornady.com/4dof.
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The new Hornady Ballistic Calculator App also features a standard BC based calculator for use with other bullets. Users can enter their own G1 or G7 BC, or choose from the entire lineup of Hornady bullets and ammunition in easily filtered pre-populated lists.