NOTE: JBM will not guarantee these calculations for ANY purpose. Remember to use common sense at all times and to check loading with current manufacturer's data.

If you think the functionality has changed, check the list of changes because it probably has! Questions about calculations may be answered on the FAQ.

General Trajectory Calculators

Range Cards

Range cards calculate bullet drop for atmospheric conditions that are different than the zero conditions. They do this by calculating a trajectory at the zero conditions and then applying the elevation angle at zero to different atmospheric conditions. For more information see this topic.

All of these calculators find the muzzle velocity at the shooting temperature by using linear interpolation given two muzzle velocities and two temperatures.

All of these calculators include spin drift as an option.

Maximum Range

Ballistic Coefficient Calculation and Conversion

Power Factor and Recoil