Most people are over choked when shooting trap...especially beginners. From 16 to 19 yards Light Modified works best. Modified is great from 20 to 23 yards. Improved Modified and Full are best kept for 24 to 27 yards. For doubles trap, Improved Cylinder for your first shot and Modified for the second. I'm a quick doubles shooter and I actually use Skeet and Imp. Cyl. in my Browning Cynergy. I go with an Imp. Cyl. choke in my Remington 870 again for doubles.