Well, I can't argue with the logic of anyone on this post but I think It really hinges on having the correct spine for your set up and having your bow tuned well. My 8% foc setup took a deer on a fairly severe quartering angle this year and only shooting 58lbs. What does this prove? Nothing, except it can be done. I've read that some ASA shooters have excellent accuracy shooting in the neighborhood of 2% FOC, this does not address the issue of penetration, It does show that the setup is at least shootable if the bow is tuned.