Not to be a stickler but FOC is Forward Of Center. "Front Of Center" is just poor English and it makes me cringe every time I hear it. Mine has always been about 12% for my hunting arrows and a bit less for target arrows. They have always grouped fine at that FOC but I've never tried anything radical to get more and see if they get better. If I can't get the heavier shaft weight since Easton dropped the A/C Superslim I may try the A/C/C next time and use a brass insert to make up the difference to get a 500 grain arrow which is also going to up the FOC substantially.