ballistic-calculator

Create Ammunition, Rifle, and Atmosphere objects, then call CalculateZeroParameters and Apply the result to your ShotParameters before calling Calculate. The returned TrajectoryPoint array contains drop, windage, velocity, energy, and time of flight per distance step.

Use table id GC with a custom DragTable subclass, a radar file loaded via DrgDragTable.Open, or a multi-BC curve built with DrgDragTableFactory.Build. Pass the DragTable instance to both CalculateZeroParameters and Calculate, since DragTable.Get(GC) throws.

It is thrown by CalculateZeroParameters when the load cannot carry to the requested zero distance, such as a subsonic load with a 1,000-yard zero. Catch it before any broader InvalidOperationException handler and treat it as a user-fixable input error.

Spin drift is modelled when the Rifle has Rifling and the Ammunition has both bullet diameter and length, folded into Windage. Coriolis requires setting Latitude on ShotParameters, and crosswind aerodynamic jump is also modelled under the same rifling conditions.

Use the BallisticXmlSerialize extension or BallisticXmlSerializer for BXml files, or System.Text.Json's JsonSerializer directly since the data classes carry JSON attributes. Both mechanisms round-trip Ammunition, Rifle, Atmosphere, and library entries.

Skip it for generic physics or projectile-motion exercises, game-engine or Unity projectile motion, plain unit conversions, and non-code ballistics questions like load-data or forensics advice. It targets real external ballistics modeling in .NET only.