Generally, the bullet is fired with rotation by the rifling. The rotation of the bullet helps the bullet’s linear motion and affects the tumbling phenomenon occurring inside the human body. In this study, we investigated how the rotation of the bullet due to the rifling affects the inside of the human body. To analyze the behavior, 10% of gelatin block was used, and the experiment was performed by changing the shape of the bullet and the impact energy of the bullet. Bullet without rifling used high-speed launch device using air pressure, and the bullet with rifling proceeded at Poongsan. The difference of the steel wire was analyzed through the bullet experiment.