I checked several sources and here is the chart they give for ther energy needed to take certain game. Just remember the longer the shot the slower the arrow is going which lowers the K/E. Personally I would want the hardest hitting for most game in case the shot isnt perfect.


Recommended Arrow Energy For Bow Hunting
25 ft. lbs. Small Game
25-41 ft. lbs. Medium Game (Deer, Antelope)
42-65 ft. lbs. Large Game (Elk, Black Bear, Wild Boar)
65 ft. lbs. Toughest Game (Cape Buffalo, Grizzly)