I hunted w/ almost your same set up w/ mine, except I'm at 31" shafts w/ 250 up front. I can get all the way up to 300 up front on the GT5575's and still get exc flight.
Mine is 60" 52# also. I draw it about 29 ish...
I'm gonna try to retune it to longer shafts as when I draw broadheads back I contacte the shelf on this bow and have to shorten my draw......been saving up for new shafts.
I have shot CX150's ,but when tuning I always seem to end up lighter than I want for hunting. I was able to get good flight w/ 175 up front.
Mike