I always set a single deke out at 40 yards so I have a marker.... and wont' shoot past that unless I feel a bird is crippled. It also tells you when you can start your shot... hope like heck you get em at least 10 yards or more inside that marker before you move....
Though IMHO if you hit the bird with a solid pattern at 40 yards, given say at least 5-6 pellets of #2 steel, that bird will never fly away... Of course they don't die like they did with lead either...
