So you must be about 29.5" arrows? Keeping your broadhead a few inches in front of your riser?

FOC of 11.5% isn't bad at all. At first blush, instinct in me expected that a 350+ grn arrow with a 75grn tip would have less than 10% FOC. With a 29.5" shaft, I calculate you to be 355grn and FOC = 10.8% with HP2's, blazers, and H nocks in your bloodlines. Most sources will say to have an FOC between 7-15%, sometimes smaller ranges of 10-13%. I like about a 13% if possible for my desired combination (hard to do with lumenocks and wraps, and 250-300" shafts though without getting my arrow weight way over where I want them).