What some of you cannot understand (other than what physics is) is that when the broadhead stops rotating which it will if mismatched, the benefits of the single bevel do not happen. The bone splitting Ashby wrote of and documented require the rotation. not true, the SINGLE BEVEL will rotate when it comes in contact with solid bone or flesh, it does not depend on fletching to rotate it. im done, i wont argue!
When I first started hunting with a recurve in 1991, the first 6 deer I ever killed were with Thunderhead 125's. A non cut on contact head. Little did I know that such a feat was actually impossible and that I should have been using only certain heads with certain fletching.....