that's why it is very very important to be honest with yourself. i know many guys that shoot traditional bows well. very very few if any i've ever met do not shoot 70 pound bows better than a 45 pound bow. even if they are accurate with the heavier bow, they are more accurate with the lighter bow. same with these guns. find your limit where accuracy breaks off and it will still kill your intended quarry, then you've found the right cartridge for the game you seek. answers the question of what's enough gun.