another ACS test made a few days ago with my shooting machine for a 13.6gpp ratio, using the same 72#@28 ACS than above (I have 4 ACS) with my actual hunting setup (string 12/18, shortened serving, silencers sims super string leeches, brace height 6.75, 2 plastic tips protectors):
27" draw length; 940gr arrow, 13.6gpp: 160 fps
28" draw length; 983gr arrow, 13.6gpp: 164 fps
29" draw length; 1020gr arrow, 13.6gpp: 172 fps
considering speed, your draw length changes everything...it is better to have some long arms rather than a fast bow
