There are4 too many variables to accuarately answer thatq question, Kiamichi. Did the arrow hit bone? Did it pass through sinew or connective tissue? What is the shaft diameter and how is the shaft finished? Is it smooth like a carbon or kind of rough like a cx Heritage? The amount of penetration that you will get is probably as dependant on the shaft of the arrow as it is on the width of the two blade. Now going to a three or four blade is a little bit different matter, but as far as comparing two blades go, You'll more or less have to guess at it and each shot is going to be different.