Module constants Copy item path Source AIR_DENSITY_SEA_LEVEL Air density at sea level (kg/m³) BC_FALLBACK_CONSERVATIVE Conservative overall BC fallback value BC_FALLBACK_HEAVY Heavy projectiles (150-200 grains)
Typical: .308 Winchester match bullets, .300 Winchester Magnum BC_FALLBACK_LARGE_CALIBER Large calibers (.264“ to .284“)
Examples: .270 Winchester, .280 Remington, 7mm Remington Magnum BC_FALLBACK_LIGHT Light projectiles (50-100 grains) BC_FALLBACK_MEDIUM Medium projectiles (100-150 grains)
Typical: .270 Winchester, .30-06 hunting bullets BC_FALLBACK_MEDIUM_CALIBER Medium calibers (.243“)
Examples: .243 Winchester, 6mm Creedmoor BC_FALLBACK_SMALL_CALIBER BC fallback values by caliber category (inches) BC_FALLBACK_ULTRA_LIGHT BC fallback values by projectile weight category (grains) BC_FALLBACK_VERY_HEAVY Very heavy projectiles (200+ grains)
Typical: .338 Lapua Magnum, .50 BMG bullets BC_FALLBACK_XLARGE_CALIBER Extra large calibers (.308“ and larger)
Examples: .308 Winchester, .30-06, .300 Winchester Magnum
Note: Lower than expected due to inclusion of older, less aerodynamic designs CD_TO_RETARD Critical drag coefficient to retardation conversion constant FPS_TO_MPS Conversion factor: feet per second to meters per second GRAINS_TO_KG Conversion factor: grains to kilograms G_ACCEL_MPS2 Physical constants used in ballistics calculations
Gravitational acceleration in m/s² MIN_DIVISION_THRESHOLD Minimum threshold for preventing division by zero in general calculations MIN_MACH_THRESHOLD Minimum threshold for Mach number calculations near unity MIN_VELOCITY_THRESHOLD Minimum threshold for velocity magnitude to avoid division by zero MPS_TO_FPS Conversion factor: meters per second to feet per second NUMERICAL_TOLERANCE General numerical tolerance for floating point comparisons ROOT_FINDING_TOLERANCE Tolerance for root finding algorithms SPEED_OF_SOUND_MPS Speed of sound at sea level, standard atmospheric conditions STANDARD_AIR_DENSITY Standard air density at sea level (kg/m³)