Oooh! Ahhh! Maybe the little trail of shed pieces will help you track the deer.
I wonder how they define "efficient." It obviously isn't reuseable, has a complex manufacture, relies on several moving and seperate components, and costs $9 each. On top of that, the first 3" of the enterance wound would be a 3/8" puncture instead of a 1" or better slice.
Give me a $2.35 RibTek any day over that gizmo. But hey; it's patentable and someone may earn a living off it.
But then, the sports that will buy that head aren't launching a 650 or 700 grain arrow with lots of fletching surface area capable of steering a simple two-edge head.
For the deer's sake let's hope it works.
Now about that sabot head, you gonna use a titanium or depleted uranium core?