Exterior (External) Ballistics

This discipline concerns that which occurs from the instant of projectile muzzle exit until the projectile touches the target. This also includes the muzzle ejecta, which is the remains of the combusted propellant powder and the microscopic bits debrided from the projectile. This is necessary for distance from muzzle to target and for helping with orientation of firearm to target at the moment of the shot. This definition also includes stability of the projectile in free flight, deceleration of the projectile, and all else contained within the definition.