I use 7.5 shot for Pheasant,Rabbit,Grouse and woodcock.
7.5 is very versitle around here, A little under powered for pheasant but I don't get shots much over 20-30 yards anyways.
For ducks and geese I use #2, But I don't "hunt" geese I only shoot one if I Jump one (I mostly Jump shoot ducks) and I make sure its within 30 yards or I don't shoot.