Newazhunter,welcome to the board...good informative folk here...
My dad shoots an 835 and so does my middle son and our guns patterned Federals new Premium Magshock heavywieghtturkey loads pretty well this last year in the # 5 shot size,throws a 1 7/8 of copperplated shot traveling some 1300fps...this is a 3 1/2 inch load...the 3inch's ballistics are pretty much the same except I believe it is loaded with a 1 5/8 of shot..Bob..