term:

Ballistics

ballistics n pl but sing or pl in constr

1 a : the science of the motion of projectiles (as bullets) in flight
b : the flight characteristics of a projectile (as a bullet)
2 : the study of the processes within a firearm as it is fired

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.