What load for Mallard ?

I plan to hunt passing mallards at ranges of up to 50 yards with a 12 gauge pump or semi auto shotgun ( possibly using a 32" barrel on a Winchester Model 12 non vent rib ). I may hunt closer over decoys with a max range of 25 yards. I am 13 so recoil is a partial issue ( I am 'big' ), I would want to use 2 3/4" shells or 3" shells at longer range. I have heard of Black Cloud by Federal Premium and Blind Side by Winchester. These two interest me the most. Has anyone used either ? How did they perform ?