A common misconception about body armor is that bigger bullets are more likely to penetrate body armor. In this Body Armor 101 video Rob Orgel of ER Tactical breaks down the science behind body armor penetration in easy to understand terms. The speed and composition of a bullet play a critical role in the likelihood that a bullet will penetrate any object, not just body armor. The faster a bullet moves, the greater chance it has for penetrating whatever material it impacts. Bullets with specially designed cores or tips, such as steel or tungsten, can also be much more difficult for body armor to stop. It's important to know both the advantages and limitations of body armor so you can buy the best body armor for your specific situation.