At what point/during what era did primitive man/hunter-gatherers realize the vital organ zone on deer and other animals and begin targeting the vitals? I get the idea in my head that early on they targeted the whole body and after that they may have thought that targeting the legs was the key because the legs carried their quarry out of range and to safety.


Get the F out of the BATFE. The F is guaranteed by the US Constitution. Those other letters are not.

https://www.youtube.com/channel/UCP92wiGadrA0VOm72gbOllQ

NRA Life Member