I have a new M2 Field (26" barrel), and working on getting it dialed in before duck season starts. Typically shoot Kent Fasteel, 3", 1 1/4, #3, sometimes #2. I'm interested in trying a close range choke, such as Skeet 1, or even Rob Roberts Triple Threat T1, which are similarly constricted from what I've read. Does anyone have experience with this choke type and gun set up? Do you find it effective for shooting decoying ducks?