Hornady launches free mobile ballistic app with 4DOF

By Jacki Billings

The Hornady App allows users to calculate ballistic data offline, when no wireless connectivity is available. (Photo: Hornady)
Ammunition maker Hornady takes a step into the world of mobile apps, releasing the new Hornady Ballistic Calculator App equipped with 4 Degrees of Freedom calculator.
The app, available for free on both Apple and Android app stores, permits shooters to calculate trajectories within environments without wireless connectivity. Hornady introduced a similar concept in 2016 when in launched an online, website version featuring the 4DOF ballistic calculator.
Capable of calculating accurate trajectories at extreme ranges, the 4DOF calculator provides solutions based on projectile Drag Coefficient in addition to exact physical modeling of the projectile, its mass and aerodynamic properties.
Hornady also says the program was the first to make aerodynamic jump calculations publicly available. Aerodynamic jump refers to the vertical shift a bullet experiences as it comes in contact with crosswind. Using drag coefficients, projectile dynamics, aerodynamic jump and spin drift, the Hornady 4DOF ballistic calculator touts itself as the “most accurate commercial trajectory program available — even at extreme ranges.”
“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

Source: Guns.com