Lining up ducks, Geo. It was wasteful to do otherwise. Two guys in a blind or crawling up and ready to shoot we'd say two heads lined up, wait for the other guy to indicate similarly, then fire. Quite a bit of tooing-and-froing sometimes but usually within 20 yards and results satisfactory. Flying shots had to be a sure thing. Our postmaster, a lame old gunner named Maurice "Monnie" Slauenwhite, once killed 21 whistlers with both barrels.