POWER FACTOR CALCULATOR
Power factors required by major shooting organizations. Power factor is calculated by the formula: bullet weight times velocity divided by 1000.
CALCULATING AMMUNITION POWER FACTOR
This form will help you calculate the power factor for most types of ammuntion as specified by common shooting organizations. Proper power factor for the caliber and weapon type is required if you plan to compete in any shooting match. All numbers are in feet per second (fps).
All divisions Minor - 125
Major by Division
Open - 160
Standard - 170
Classic - 170
Revolver - 170
Production - 125 Minimum (No Major)
All Divisions Minor - 60
No velocities below 400 fps allowed
Max velocity for revolvers - 1000
Max velocity for rifles - 1400
Pocket pistols, derringers, and long range rifles are exempt from the power factor and velocity requirements.