Lots of things in Archery are not Black & White, 2+2=4, or the Gospel[8D]

Too many variables in shooters, and setups.

For every expert you find that says one thing on a subject you can find another that says different.

Shoot your arrows, do your testing on whatever thesubject is,and make your own mind up.

My main hunting arrows will be about 12% FOC, but I do have a set of FMJ's I will use out of one rig that has over 20% and they fly, group, and penetrate outstanding. Trajectory is more arched but they weigh over 100 grains more than my other arrows.

If they would fly flatter with less FOC? Personally I don't care I have seen the advantage of extreme FOC and those arrows will only be used short range anyway (approx. 35 yards or less)

Dan