Read my above post, you don't need crazy weight Fred eichler killed all but two animals I believe of the super slam with an easton axis a standard easton insert and 125 gr muzzy phantoms, don't get hung up on weight, just make sure your arrows fly true and you have very sharp broadheads, I only run 200 grains on the front of my only because that's what they bare shafted best with, the whole arrow weight FOC thing is great when hunting cape buff, unless you're hunting dangerous game don't get too worried