Well the results are in

with a 363 grain arrow at 68 lbs 300 fps with a 28 in draw that gives me 72.56 lbs of kinetic energy

same arrow 62 lbs 291 fps
same arrrow 66 lbs 297 fps
Well i did hit the 300 mark but i guess my short draw length and the extra weight of the arrowslowed it down a little bit. My guess is itll still be fast enough!