5.45×39mm vs 7mm Ammunition Test | Power & Size Comparison | Military Ammo Experiment In this video, we compare 5.45×39mm and 7mm ammunition to observe differences in size, design, and impact behavior. This content is created for educational and informational purposes only. All testing shown is legally filmed outside restricted regions. ⚠️ Do not try to imitate this experiment. ⚠️ No weapon modification or usage tutorial is provided. Follow for more military equipment and ammo comparison videos.