I shot a doe last night with a 100 grain Spitfire on an 29" ACC 360 out of a 65# Martin cougar at 16 yards. She was standing straight broadside, I hit here 3" Back from the shoulder and center of body in hight. Perfect double lung shot. I had NO pass through. I can not believe that this arrow didn't pass through. It left only a mark on the inside of the opposite side rib cage. I caught two ribs at the same time with the blades but that still shouldn't of mattered! It did leave a nice hole in the entrance side! I will not shoot another deer with these heads. I new I should of stuck with my Muzzy's. BBBB....BAD TO THE BONE