I second the Winchester Supremes. I would try 5 or 6 shot, because even with errant flyers, you have more chances (i.e. more pellets!) to hit the mark.
Save the money you were going to put in the X-tended Range, and put that money into an optics system. Either a cheap red-dot scope, or fiber optic sights. I used a c-lect choke Mossberg for years, and used #6 Winchester supremes with great results. Those results increased drastically when I added a fiber optic bead and painted the rear site with optic paint
