well i ment a heavier tip. take the same arrow with a 85 grain tip vs one with a 125 grain tip. That will change the FOC but will it drop enough to notice? Im not really seeing how it would. Yea now the arrow weighs a little more but at the same time you just moved the FOC forward more so its a little more easier for the fletching to stablize the arrow. I guess the best thing for me to do is just mess around with some different arrow setups and see what happens.