I agree with BGfisher and Moonge on both posts. I feel that running a 30.5" 400@70lbs to be a little much when you are trying to steer a broadhead, I'd say throw a helical on them and see if that helps stabilize things, if not then change up to the 340's. I run ICSCH400's at 28" shaft length out of my 29" drawlength setup (Bodoodle Pro 500 set back some) with 4" Duravanes or AAE's with a pretty tight helical to stabilize my Wasp Hammer SST fixed blades better. They fly like they were on a rail out of my setup at 64-65lbs. (this year I've harvested deer, turkey, and earlier a woodchuck that was raiding my garden) They work great and are very accurate, and IMHO there is no need for goldtips or any other carbon on the market if you can get these to fly with the right combination. Just my own thoughts, Pinwheel 12