Case in point, humans aren't as tough as big game animals when shot. The 5.56 has been used in the military since Vietnam, BUT ask most combat vets if they wish they had more killing power, frontal area, etc. and the answer would be a resounding YES. Think about it... the 6.8 SPC was designed from the ground up to compete with and beat ballistically the 7.62x39 cartridge because of the lack of knockdown power the 5.56 had.
They are using the wrong bullets.
"Be sure you're right. Then go ahead." Fess Parker as Davy Crockett
