I have a 535 thumbhole with the 20" barrel. I bought an Indian Creek choke for it and it throws a devastating pattern at 50 yards with Hevi-13 3" #7's. I've never tried the 3 1/2" Hevis since the cheaper 3"-ers do just fine. I had an 835 several years back (which was a great shotgun), and I prefer my 535 since it is lighter. Now, I'll warn you ahead of time. It will thump you with big shells! But it won't kill you. I handled a few of the tactical Mossys, and I didnt' like them. They look and feel cool, but they don't seem very sturdy. I have actually heard stories of the adjustable stocks closing up under heavy recoil. The thumbhole makes this gun an extension of your arm. I love it. And on top of all that... With an imp cyl choke, I've got an awesome slug gun. I shoot fist-sized groups with cheapo Winchester 2 3/4" rifled slugs at 50 yards using my turkey sights.