The debates over which is better are silly, you have to define the goal first. If the goal is to not miss the 10, then 11' s are irrelevant and a guy who shoots all 10' s but no 11' s scores lower, but shot better than a guy who shoots 1 8 and tons of 11' s.

It the same as shooting " up" it isn' t. If you shot for the 12 (ASA) and hit it you are not " up" you got what you aimed at. In IBO basically you just redefined what a " good" shot is from a 10 to an 11. So the guy who shoots the most 11' s hit what he was aiming at more, he shot better. Hitting a 10, or hitting an 8, you missed.

--Bob