Switch to feathers and 100 grain tips. You'll loose weight on the tail and gain weight on the tip. Better FOC with little, if any, gain in net arrow weight.

The rule of thumb is to have an FOC of 10-14% for broadheads. But it's only a rule of thumb and lot's of people successfully shoot setups that violate that rule. If it was me, and my arrows were flying straight and accurate, I'd go have a high octane margarita and quit stressing.<img src=icon_smile_wink.gif border=0 align=middle>