The experiments of small scale projectiles penetrating SFRC targets are performed on the 57mm diameter light gas gun. They are intended to investigate the performance of the projectile penetrating into the steel fiber reinforced concrete (SFRC) targets (volume percentage of 5). The impacted crater shapes of SFRC targets are observed, and the velocities of projectiles impacting the targets are measured. The crater volume of the targets is measured by the pouring sand-filling method, and the penetration volume is calculated. The relation between the kinetic energy of the projectile and the penetration volume is obtained. The kinetic energy of per unit penetration volume and the impact kinetic energy per unit cross section are introduced to review their relation by dealing with the experimental data.