I think I experiment a little more with your broadheads. You arrow is about 403 grains with is plenty of wieght for a carbon arrow. gobblegetterNY is right about the spot hit. I have put a 400 grain carbon arrow through a deers paddle bone before with a complet pass through, but i wouldn't bet money on that happening every time. I shot one once with a 65 lb recurve and over a 500 grain arrow with a 140 grain cut on impact broadhead in the paddle bone at 15 yards and it bonced out only going in broaddhead deep. Makes a difference how you hit it. I have been blowing through every thing with my 400 grain axis arrows and thunderheads