I shot 80 plus pound bows for years. As the newer bows got more efficient I realized that there was a law of diminishing returns as I went heavier in poundage. My North American hunting rig is a Bowtech CPXL 72# bow shooting a 3-71 ACC with a 125 gn head. This is considered a heavy arrow by todays standard. Blows through everything I have shot, bears, elk, moose, deer even most African Plainsgame. However, when I turn my sights to Buffalo and things of this nature, I whip out the 84 pounder and sling the 700-900 gn arrows.