I'd say you'd cripple more birds than you killed. And the ones you did kill would have you spitting BBs out on your plate at dinner time.

#2 is legal here in GA

If your dead set on body shots, #4 hevishot will have the best penetration and knockdown power. That being said, especially as a gun hunter, why take body shots? up your sights a few inches and take the head/neck shot with #6 winchesters, its cheaper and more lethal

#4 and smaller shot in Missouri. I use my 7 1/2's that I use for quail or squirrels. If you call em close shot size does'nt matter. I'm usually more concerned about not hitting my feet, or decoy's, than missing the turkey.