I made it out to Angeles Shooting Range and had a great afternoon breaking in my new Mossberg 590A1. Recoils was very managable using both full powered Fiocchi and Winchester OO buckshot, the magazine easily took 5 of either shell. The Fiocchi shells were softer shooting and patterned a bit higher at 15 yards than the Winchester shells.
Fiocchi Patterns at 15 yards (left 1 shell, right 5 shells)
Winchester Patterns at 15 yards (left 1 shell, right 5 shells)