Meet the 5 Deadliest Bullets on the Planet Since their invention in the tenth century, engineers, soldiers and tinkerers have constantly tried to make firearms more deadly. Here's What You Need to Know: These bullets pack a powerful punch. Since their invention in the tenth century, engineers, soldiers and tinkerers have constantly tried to make firearms more deadly. Typically that involves moving to heavier bullets driven by more powerful gunpowders, and while that is effective it is also louder, generates more recoil and necessitates new firearms. One solution is the creation of newer, deadlier ammunition for existing guns. Dum Dum Bullets