ORIGINAL: mobowhuntr
they open through impact leaving a smaller entrance hole (those who can elaborate on this please do so/ or correct this) and a large exit hole........
What Rob is talking about is since the blades open from the front, to the rear, the blades need to enter the animal before they open. Since the blades aren't deployed as they enter, as they are with the Snyper, the entrance hole is smaller. BUT.....it's moot point, IMO. They only need to enter the animal 1" before they are fully deployed, so by the time the blades get to the lungs and heart of the deer, you're at maximum cutting diameter.
My only concern is if one doesn't have an exit hole, the smaller entrance hole may prevent a good blood trail. Theoretically.