Well,, I got 287 fps with a 391.4 grain Easton Fatboy 340 @ 60/29 so add about 2 fps per pound of draw weight increase,,, 5 pounds X 2fps = 10 + 287 = 297 fps. Might not make it but I'm guessing that you'll be VERY close if not over 75 ft. lbs. K.E. Heck,,, you could probably shoot a 7 inch mechanical with that much energy