Understand ballistic coefficients without the marketing fog

A ballistic coefficient compares projectile drag with a named reference model. A number without its G1, G7, or other model is incomplete. A higher published number does not automatically mean a better projectile for a particular rifle, distance, velocity range, or competition. Different manufacturers and sources may use different test methods, velocity bands, averaging, rounding, or promotional choices. A single constant BC approximates behavior across a velocity range; some sources provide stepped values or measured drag data for greater fidelity. The best input is traceable to the exact projectile and model, plausible for the velocity regime, and validated with trustworthy observations.

Never swap the model and keep the number. G1 and G7 coefficients are not interchangeable labels on one value. Pair the coefficient with the model and source that produced it.

Expected result. You can compare BC claims by model, source, and evidence instead of ranking projectiles by one unlabeled number.