Application

The squares on the M16A2 25-meter zero target are designed so that one click of elevation moves the strike of the bullet one square on the target. Three clicks of windage move the strike of the bullet one square on the target.

Section IV. BALLISTICS

Commanders and marksmanship trainers must understand some aspects of ballistics to teach the principles of zeroing and engagement of long-range targets. Ballistics is a science dealing with the motion and flight characteristics of projectiles. The study of ballistics in rifles is divided into three categories: internal, external, and terminal.

• Internal ballistics concerns what happens to the bullet before it leaves the muzzle of the rifle.

• External ballistics deals with factors affecting the flight path of the bullet between the muzzle of the rifle and the target.

• Terminal ballistics deals with what happens to the bullet when it comes in contact with the target.

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