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💣 Ammo

API Documentation

py_ballisticcalc.munition.Ammo

An Ammo instance describes all details of a projectile and cartridge that can affect a trajectory:

  • Drag curves, typically via Ballistic Coefficient referenced to a standard drag model.
  • Muzzle velocity, including (optionally) any variations in velocity caused by powder temperature sensitivity.
  • Size and weight, which determine spin drift and stability.

Example

Imports: 

from py_ballisticcalc import Ammo, Unit, DragModel

Create an Ammo instance: 

ammo = Ammo(
    dm=DragModel(
        bc=0.381,
        drag_table=TableG7,
        weight=Unit.Grain(300),
        length=Unit.Inch(1.7),
        diameter=Unit.Inch(0.338),
    ),
    mv=Unit.MPS(815),
    powder_temp=Unit.Celsius(15),
    temp_modifier=0.123,
    use_powder_sensitivity=True,
)
In this example, we use Unit helpers to initialize Ammo fields with specific units. We also can do it using float values, in which case those attributes will be initialized with unit types defined by PreferredUnits class.