My hunting rig is much different than my 3d rig, Hunting I like to shoot heavy. If my bow will shoot 300 fps at 5 gr per then I will take that speed and turn it in to KE by building heavy arrows. A heavy arrow like say 450 gr will slow a 300 fps bow down to the 250 fps but the KE will be high, that is what I am looking for knock down power.