I have an 835 topped with a Simmons 2X Prodiamond Scope. I love this setup. Last year I shot Remington 3.5 " HV Hevi Shot #5's through a Star Dot Choke. It was impressive and did unbelievable things to a gobbler at a ridiculous range. I have also done real well with a Hastings .685 and 3.5" Winchester HV #4's turkey loads.
This year I have found my dream pattern. Nitro 4x5x7 Hevis Shot through a Primos Jellyhead choke. 260 hits in a 10" circle at 40 yards.