As for Ashbey's work. As I stated in another post. I'd like to see the same test doen with a modern compound. You can not simply do a test with the lightest peice of equipment out there (Where arrow weight will give you the best results) and say that's how it is across the board. With a bow as slow as the one he was using arrow weight is the only deciding factor in penetration. Like any experiment. If you use only one pool it really isn't worth the paper it's printed on.