JBM's nerdy page, rebuilt: add the bullet's length and your barrel's twist and the solver layers spin drift and Coriolis onto the point-mass trajectory, and reports the Miller stability factor it used.
Read this before you rely on any number here. Predictions use the standard G1/G7 drag models and the data you enter — they are estimates, not measurements, and they are never load advice. Confirm with live fire at distance. For anything you load yourself, work only from current published manuals (Hodgdon, Sierra, Hornady, Lyman), start low, and work up. TruingLog publishes no load recipes and suggests no charge weights.