I shoot the 400 spine ICS Bowhunters out of my 55# recurve cut to 29" with a total of 275 grains up front. With weight tubes and the 250 grain field tips/broadheads, they come in at about 11.3 gpp with 21.5% foc.
Sometimes staying at 10 gpp is difficult if you are starting out with a shaft that is pretty stiff for your draw weight. I would just try to get them flying like darts and hitting right where you look, then figure out what the gpp and foc is with that setup and as long as it falls in the 9-?? gpp range with a decent foc, your good to go. Good clean arrow flight is the goal, and in the end, thats what matters most.