I like to extend my effective range out to as far as I can effectively shoot, which is around 30 yards at the moment. I personally shoot the best (with my 30" draw) with around 9.5 gr/lb, which comes out to between 520-640 grains depending on which bow I'm shooting. I try to get a high FOC with that weight, then leave it alone and focus on hitting what I'm shooting at
I guess the difference between my setup and some others is that the really heavy, high FOC setups are designed to deal with the worst of situations, while I design mine to help me best avoid those situations. The flatter trajectory is much more forgiving of distance judgement errors.
Craig