I think all of us selfbow shooters go through a stone point phase, early on I wanted to kill a deer with one but by best friend and selfbow mentor had already gone through his stone point phase with the result of a number of unrecovered deer. I think he recovered 2 out of the 5 deer he shot with stone points, because of this he went back to steel. That said; he wasn't a great flint knapper or the best shot, didn't make the best flying arrows and might take a low percentage shot, there are a lot of variables associated with stone point success.
I have another friend who is a great shot and has places to hunt where he can pick and choose only high percentage shots, he is deadly with stone points and has killed a lot of game with them. He also has people knap perfect, very sharp, weight matched points for him.
Nolan with one of his stone point kills, I made his bow;