and if my memory serves me right a high FOC arrow will carry much more momentum than a normal or low FOC arrow. Look at it this way. there is a reason Trad hunter like the heavy arrow setups with heavy heads, it allows them the most penetration with the lower speeds of those bows. and IMHO if I put that type of setup on my compound shooting much higher speeds its gonna feel like a freight train when it hits something possibly casuing some shock (I know it may be very minimal but its got to help some) to go with the cutting the blades of the broadhead will do.