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Estimate bullet energy at 500 yards.

Estimate speed at distance using a simplified drag factor.

Estimate velocity loss over distance using a drag factor.

Estimate twist rate from bullet length and diameter.

Estimate twist rate using bullet length and diameter.

Estimate optimal twist rate based on bullet length, diameter, and velocity.

Estimate bullet spin rate from velocity and twist rate.

Estimate bullet spin rate from rifle velocity and twist rate.

Estimate spin drift using distance, velocity, and drift factor.

Estimate spin drift from distance and velocity.

Estimate elevation hold using drop and distance.

Estimate wind drift and drop at distance using simplified inputs.

Estimate elevation hold in MOA from drop and distance.

Estimate MOA hold from drop and distance for a DOPE card.

Estimate elevation hold in MOA from drop and distance.

Estimate bullet path relative to line of sight.

Estimate arc drop from distance and velocity.

Estimate trajectory drop at a given distance.

Estimate maximum point-blank range from vital zone size.

Estimate maximum point-blank range from vital zone size.

Estimate a lethality score from energy and expansion.

Estimate placement margin from vital zone and group size.

Estimate dispersion diameter from MOA and distance.

Estimate shot pattern diameter from distance and choke factor.

Estimate pellet spread diameter based on distance and choke.

Estimate choke constriction from bore and exit diameters.

Calculate choke constriction from bore and exit diameters.

Estimate pellet count from shot weight and pellet weight.