I shoot my bow allmost every day of the year , and have been for many years . The reson for my first reply is I belive there are many far more critical things that sould be addressed concerning tuning before one considers foc . Some here have stated between 7 and 14 is fine , and I agree . The guys who say its got to be within a certian range 10 to 13 for the best results , I disagree with . Spine match , and consistancy have to be at least 10 times as important as foc , and its a pain to find arrows that are consistant in that regaurd . Another theory , that going heavy will help with broadhead flight I allso disagree with , If anything it will make your arrow flight look like a rainbow and your pin gap will definatly increase . Not a bad thing but its an issue . My take on foc , try not to go too heavy , and dont worry about it , worry about spine , and makeing your arrows as close to identical as possable . The guys just starting in this sport dont need something else to worry about , especialy when it wont make a big or even a small effect on their accuracy . Lots of new guys in here , they dont need the wrong messages , or concerns .