No law says a shotgun has to kick. I don't do any bird hunting but do shoot a lot of shotgun ammo.
I keep it simple, I use 1 oz shot, in bird shot, slugs, and buck shot. I load them to about 1200 fps and there is vertically no recoil out of my Rem 870.
My grand kids shoot this load and don't complain about the recoil at all.
To my way of thinking, shooting is suppose to be fun, if you're getting beat to death, it isn't fun.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071