Going this weekend with a co-worker and his friend who are old hands at this. I've shot skeet and sporting clays and usually do well at that, but I've never hunted birds before. Going to use an 870 Wingmaster, 26" barrel. Remington #7.5 Game Loads. This is going to be at a "managed" public hunting area that has limited hours, 2 days a week, and the season just started recently, so I'm trying to decide whether to use a IC or Modified choke. Any ideas on the choke, and any other tips? We're probably going to walk the area and flush birds depending on who else is there.