I'd choke her down a little bit, longbeards can do so much more than that.  I don't know how the chokes sizes in the 835 run. I think they run in larger choke sizes for the same effect, but I have an SX3 and use a .665 choke, 870's run good with that choke also, I have 2 of them.  When I patterned the SX3 Longbeard #5 pattern was so tight at 40 yards I am afraid to hunt with them.  I don't want to buy a more open choke right now or I would use the LB's.  For now I will stick with Winchester Supreme High Velocity #5's.  Good Luck