One of the most clearly remembered things as a kid in my fishing village 65 years ago, watching the old-time gunners in blinds and gunning tubs, was that they leaned slightly forward and raised their doubles into line of vision, all sort of rounded at the top as if they were sneaking up on something. I don't recall any variance; maybe that's why they were all good shooters. I remember Old Monnie, the postmaster, taking 22 whistlers out of the air over decoys with his old black-powder double. Sometimes I think I saw the best of it.