I also wanted to show you guys what a heavy arrow (or bolt) will do. My shot went low through the chest and hit the offside humorus bone just above the joint, breaking it completely in half and dislocating the joint. The arrow continued through and was caught at about the fletching. The arrow was 650 gr. with Zwickey head and was going 163 fps (chronoed it) at the bow. In this case, it was not necessary but if I woulda hit a big bone like that going in, I think it still would've penetrated through the chest. The BH was fine. I sharpened it up and it's ready to go again.