I've only been so this is based on limited experence, more on what the old guys that were with us said.
Use a IC choke and #5 in a premium load. That's what they told us and it worked good. From what I say FC would be a hinderence. We were hunting a lot of thick stuff, even some tree rows, and most of the shots were well inside of 25 yards. Some much closer.
That said I can see where a full choke would be useful in big fields.
Comes down to what type land you are hunting.
We're going in a few weeks, to a new place, and I'll start with the IC but carry the others just incase. I know I'm ignorant so I like a backup plan.