I am with dax and Ryano, dax knows my own personal experience, and me and Ryano have discussed this as well. YES stone will kill, and you can pretty much get 100% recovery rate on squirrels and rabbits, but deer are a different story. I know that billy has killed a deer with stone point....but.., i have shot enough to know it doesnt always have a story book ending. deer i have shot with stone point and a 75pound selfbow at 8 - 15 yards have gotten away and if i was shooting steel i am sure the shot would have been fatal.
i will tell you right now, it is based on a lot of shooting skill, and even more luck. if you hit a rib going in it will almost certainly not exit the other side....the entry wound must miss rib to get maximum penetration, and a stone point just doesnt have the strength and sharpness as steel, and in a lot of cases will harmlessly push organs aside and not be fatal or...may be fatal in a few days.
if you miss ribs then you will most likely kill the deer, but if you hit rib, good luck on that blood trail. of course there are some chances when hitting a rib could benefit, like deflecting into the heart or jamming broken bone into an organ, but you simply cannot rely on that to happen. so as Ryano said, you are really handicapping yourself using stone, which is ok as long as you understand ahead of time that you might not get the animal even on a great shot.
I come from the otherside of the fence, originally. i told people without a doubt that stone was sharper than steel and will kill just as easily, until i got first hand experience. and i dont mean just one deer either, Ii have lost a few that i made good shots on. and yes stone i have knocked flakes from have been sharper than steel, but that was a thin flake. you can shave with that thin flake, but when you chip all the other flakes off, its no longer shave-able. Despite thinking its a bunch of little razor blades, i can scrape it along my arm and not slice myself open, but if i try that with one of my trade points i would need stitches
I admire Billy's tenacity and love of hunting with stone, and i wish him the very best in using it, but i honestly dont think he has enough experience in shooting big game to see the loss it causes, i kill squirrels all the time with nothing more than a 40 cal empty shell casing, so killing one with a bird point really isnt accomplishing much..in all honestly. (that wasnt directed to be insulting, hitting a squirrel is tough to do, i am not saying its easy, but killing it once its hit with an arrow is not too hard). And really, I like Billy for what i know about him, i think he has lots of knowledge and skill and i certainly wouldnt bad mouth him for his choices or accomplishments. But i am afraid that he will have future bad experiences, with continuing to shoot stone points at deer especially from a selfbow in the 40# range. i shoot 75-80# at deer and have never got out both sides of a deer using stone, and that was with very well made heads, and perfectly straight shooting arrows. but have always got complete penetration using steel - Ryan