**Useful Formulas For
Shooters**

**Sight Adjustment**

Sight Radius (inches) X Error at Target (inches) / Range (inches) = Change in Front Sight Height (inches)

**Free Recoil Energy**

Weight of Gun (pounds) X (Velocity of Gun (fps))˛ / 64.4 = Free Recoil Energy (ft-lbs)

**Sectional Density**

Weight (pounds) / Cross-sectional Area (square inches) = Sectional Density

Bullet Weight (gr/7000) / Area (diameter˛) = Sectional Density

**Kinetic Energy**

Momentum X (Velocity/2) = Energy

(Weight (grains) X Velocity˛ (fps)) / 450436 = Energy (ft-lbs)

**Momentum**

Mass X Velocity + Momentum

Weight (grains) / (7000 X 32.174) = Mass

Weight (grains) / (225218) = Mass