Airgun Ballistics Lab.

GA / G1 point-mass solver · RK4 · HAM-measured BCs · validated ±1% vs LabRadar data

ρ – lbm/ft³ Mach 1 – fps –% sea-level air

Units

System Angle

Projectiles

Setup & environment

Zero range40 yd

Sight height1.75 in

Crosswind10 mph

Altitude5,614 ft

Temperature75 °F

Max range75 yd

Point blank zone Show

Currently zeroed at yd Re-zero for yd Click value

Clicks from this zero to every range

Ballistic coefficients: Hard Air Magazine measured database (GA model for diabolo pellets, G1 for slugs); .25/43.2 gr, .30/44.75 gr, .35 pellet and large-bore slug BCs estimated from sectional density and form factor as documented in the companion report. Solver: 3-DOF point mass, RK4, drag along air-relative velocity; reproduces HAM LabRadar velocity pairs within ±1% RMS and Chairgun published drop/drift within published precision. Drift assumes a full-value 90° crosswind. Amber velocity readouts flag the transonic drag rise (>Mach 0.9) where real diabolos lose BC and stability.