All I know is this: If you shoot a deer with a razor sharp, fixed blade broadhead in such a manner that the entry angle would take out either the heart, BOTH lungs, and/or dead center the liver or slice a major artery (granting that the arrow reaches the deer with proper energy), said broadhead will kill the deer every single time. That is any sharp fixed-blade broadhead. You can't say that about a field point or a mechanical that doesn't open. Mechanicals may work 99 times out of a 100 but I don't trust them. Just my