I never got up into the high dollar carbons, so I'll defer to your experience there. With Goltips, Beman ICSH and PSE Dominators, I tried everything from 85 grains up to 145 grains and didn't see any improvement with any of them. They all shot pretty much the same, but 4" groups at 20 yards just isn't acceptable, for me anyway, when standing on the practice range.