RE: How far is too far?
IMO the real problem with the long distance shots is that it gives the animal quite of bit of time (relatively speaking here) to move regardless of how gifted an archer is at hitting a spot. The olympic archers compete at 70 meters and they are redicluously accurate. However, put a deer, elk, whatever out there at 70 meters and try shooting at it. If it hears or sees that bow go off it can move a long way before that arrow arrives.