Thanks for all the FOC's. This would be an interesting thread to keep running and see what everyone is using.

20%

Let me preface this by saying that FOC is the last thing I worry about with respect to my arrows. I only know these numbers because at some point someone asked me and I checked. That being said:

Field and 3D arrows: 10%

Indoor target arrows: Not sure. I'll have to check.

Hunting arrows: 13%, and I've blown clean through every species I've hunted up to an including bull moose.

here's a post to show the real world advantages of weight and high foc. Things happen even on good shots.
  Single bevel and EFOC damage

Ben,

That's a cool thread, and I enjoyed reading it. But truth be known, that's nothing folks (myself included) haven't been doing with regular arrows for a long, long time.