I began designing and making single bevel heads over a decade ago. I wrote a companion piece with Dr. Ashby for Traditional bowhunter magazine back then. I am not affiliated with him and his products. Other sellers of single bevel pbroadheads have used my images but I dont make and sell single bevel broadheads. I use them and in this case, Im using the Cutthroat Single bevel as its a great design and made from some awesome steel.
Here is some photos of a fresh deer kill test I did back in 2008
I made three shots from 10 yards with my 45 pound longbow that shoots an arrow at a blazing 142 FPS. the first two were through the ribs and the final one hit the shoulder blade at the point where the flat and the "T" meet, right near the ball joint. This is (in my opinion) the largest and thickest bone section in the upper shoulder. I admit that hitting this far forward is not a good place to aim on a live animal but things happen beyond our control. I of course hit this spot with pin point precision on purpose.
The rib shots were complete pass throughs but the shoulder shot ended up with just the fletches sticking out entrance side. I know there were no lungs in the deer but they don't offer much in the way of resistance any way. Also consider that this deer was cold and stiff as rigor mortise had set in so I consider all things equal.
Right off the bat, I noticed the "S" shaped cuts that Dr. Ashby had spoke about. This was the case on both the entrance and exit holes.
*** Word of caution***
When you pull the arrow back out of the deer (through a bone) and you have sharpened your broadheads on the trailing edge as well as the main edge. Make sure to keep your fingers clear even though you need to hold the deer steady while retrieving the arrow.
After a brief bit of first aid, I began to skin the deer, I noticed that both of the rib shots had completely missed hitting ribs on both sides. My goal was to break a rib to see the results but I must have used up all my luck..... I mean skill on that shoulder shot.