You can shoot slugs out of it just fine. And as a matter of fact most of my smoothbores actually shoot more accurate with a modified choke instead of a IC, doesn't hurt to try both though.

The 835 is the 3.5 you can not shoot slugs out of because it has a larger barrel to improve patterns supposedly. But a remington 3.5 will shoot 2 3/4 to 3.5 inch shells just fine. I have a buddy that has a special purpose turkey gun and it will shoot anything we put in it. He actually uses a rifle barrel on it to deer hunt with.

Paul