I shoot an 835. IMO, probably the best patterning gun. The 835 does very well with chokes in the .670 to .676 ranges. Some of these are the Indian Creek .675, Pure Gold .670, Stardot .676, Sumtoy .670 or .675 and SSX. With your Longbeards in #5 or 6's you will get Great patterns with any of these. I personally shoot Hevi 7's with a .670 Pure Gold. Check the classified choke section and see what is available. Good luck. Welcome to OG!