I ran some numbers of a 28 1/2" vectrix.


I used 6 grain per pound for each setup.


60# at 40 yards yielded 48.2 ft lb of ke. 360 gr arrow


50# at 20 yards yielded 45 ft lb of ke 300 gr arrow


The 50# bow shot the 360 grain arrow at 20 yards with 45.4 ft lb ke.