I certainly believe there is a point of diminishing returns, but a bell curve? I doubt it's so. If it were a nice bell curve, someone could sit down and come up with a foolproof mathematical formula to plug numbers into and always come up with the perfect arrow setup for whatever speed you were looking to get. So, if it really was that easy, I'm sure some brainiac would've already figured it out and we'd all be using calculators to make arrow/fletching/broadhead/FOC selections.

You know, TFOX, there are so many things going on with arrows that it really boggles the mind. And I am one that is easily boggled. That's probably why I like my slow old logs so much. They're easy to tune, outside forces don't affect them as much as they do light, fast arrows. And even with my imperfect form and tuning skills, I can still get great arrow flight and accuracy.