AllenRead,

My experience with Extreme FOC arrows is quite limited at this point. It has been very positive, but not enough to warrant making your decision according to what I've experienced. However, Ashby's experience is far more extensive and all indications are that extreme FOC is a distinct benefit when not hitting heavy bone. In the heavy bone instance, heavy weight appears to be the overriding factor. It's easy enough to shoot an arrow that has both, which is what I've chosen to do. Weight tubes are probably not needed unless you want to get into the 700-900 grain range.

When designing the tip, you don't have to use heavy broadheads. You can choose to go with weighted inserts, inserts made of heavier metals, insert adapters or a combination of all of these. I'm also using the 220 grain Muzzy broadheads (200 gr w/out insert) on one of my setups. On another setup, I'm using 125 gr head, with a weighted insert and 100 grains of insert weights.

If you go to a supplier for traditional equipment, you can buy broadheads and fieldpoints in the higher weights very easily, but it's not necessary in many cases.

In my opinion, when hunting whitetails, heavy weight will be more beneficial than extreme FOC. If you hit the chest, you will make it through with almost anything. If you hit a heavy bone, it will likely take the heavy arrow (over 650 gr) to break the bone. Even so, consider the extreme FOC arrow if you're hunting larger game or if you want more stability in wind or when hitting twigs.