Do a search on this site as well as the following site:

http://oldgobbler.com/TheForum/index.php/board,2.0.html

and start reading what works in the 835. These two sites and the information within should lead you in the right direction on choke/ load combinations that work for your gun. Rememeber that every gun shoots different, even within the same brand and model, but I'm willing to bet that your pattern can be vastly improved with a choke and load change,

Gman