RE: Update...broadhead flight.
Download the easton guide to tuning off their web site.Do an initial paper tune,then procede to broadhead tuning.Your shafts will probaly show weak(Bh's right of FP's)Turn your bow weight down and see if it gets better.make sure and keep an eye on your tiller and nock point as you lower the weight.If the groups come together then you can shoot that weight or go get some stiffer arrows.If you have room to cut off an inch or two that will make them stiffer also.As would using a lighter point.Good luck.
CB