Actually, I believe the Ultimag shoots up to a 3-1/2" shell if memory serves me correct. At least the 10 ga. does. I have had 2 friends own one and neither has liked it though. You are not supposed to shoot slugs through the standard barrels (one friend actually didn't see the warning on the barrel and blew out the side of his with a slug too[X(]) and they tend to make a lot of racket once they loosen up. I could locate one of my buddies in the woods just by listening for his gun!

I have owned a couple Mossberg 500's over the years and love them for beater guns, but I don't think I would spend the money on an 835 after seeing and hearing what I have from friends who have.

Good luck.