Unless you are a top notch shooter, full choke at 16 yards would be a handicap. A mod choke would be more than enough. Many good doubles shooters use even a IC choke on the first barrel and a IM or full on the second. The really good shooters like a full choke so they see a " dust ball " so if they get a little off they can tell where to correct it. That dust ball doesn't leave much room for error. As suggested, go to station 3 and with just straight a-ways see what sight picture you need to break the targets. You'll probably need some padding to see the bird when it breaks. Good luck.