My question is, Just how sharp does a blade need to be to kill efficiently? I mean sure sharper is better, but with the speeds we're shooting these days the edge of a spoon would probably get the job done. I mean does the thing have to be sharp enough to cut a human hair lenghtwise? Didn't Indians kill all kinds of things using stone and flint broadheads. I'm not saying that stone would be sharp enough, or a spoon, but just how sharp is sharp enough? Just think that wanting heads that could perform plastic surgery on a person is a bit overkill for hunting. I havenever had a probelm with penetration using BH's right out of the box, but maybe I'm a unique example. JMO