This paper describes the computer dynamics of fluids, which was used to determine the influence of certain geometrical characteristics of the projectile on the coefficient of drag force. The first section is an introduction and describes the projectile, the aerodynamic forces acting on the projectile with special reference to drag. The second section was reserved for a review of projectile parameters that affect drag, primarily the slenderness of the ogive and the frustum, and the shape of the ogive, and the angle of the frustum. This section also defines drag in more detail. The third section describes the mathematical model of fluid in supersonic flow and gives the equations for the mathematical model, used in simulations and software package Ansys fluent. This section was also reserved for describing the emergence of a physical model and the verification of the numerical simulation model. The fourth section presents and describes the model of CFD analysis of 5.56 mm projectiles: SS109, M855, L110, and M856, and the comparison of projectiles by geometry. The fifth section comprises the analysis of the results. In the sixth section, a conclusion is given.