Hello, chiming in here.

The Mossberg is what it is, a pretty darn good pump shotgun, which can be fit with several different barrels to suit the job at hand. Shot barrel with different chokes for shot, smooth bore barrel w/ rifled sights for slugs, rifled barrel w/ rifled sights for slugs, rifled barrel w/ cantilever scope mount for slugs, etc. All in all a good value for the money due to the wide range it can cover. In my opinion, the Mossberg is one little step below the Remington 870. These 2, the Mossberg 500 & Rem 870 are quite the popular shotguns of choice.

Now the H&R Ultra is strictly designed, engineered and intended for the sole purpose of shooting slugs, very accurately. The heavy bull barrel, Fort Knox vault lock up and scope mount directly to the barrel (not the action) all come together to deliver incredible accuracy.

I really don't believe that a Mossberg pump could match the accuracy of the H&R. Any Mossy that would deliver accuracy anywhere near the H&R, in my opinion, would probobly have to be fit with a cantilever scope mount rifled slug barrel.

I have been shooting a 12 gauge H&R ULtra Slug Hunter Deluxe for quite a while and have never looked back, buying another in 20 gauge for my oldest deer hunting son. I imagine there's another in the future as I have two other sons moving up in age.

Both of these (12 & 20) are the real deal for putting deer down and in the freezer.