Sold one of my 835's, so trying to thin a few of these out...
1) TRULOCK Precision Hunter Extended, SS, Black Finish, Knurled Head
See at http://www.trulockchokes.com/get-chokes ... See+Chokes
PHM12751, Skeet 2/Light Modified, 0.751"ID/0.023" Constriction, Not Ported
PHM12735, Improved Modified, 0.735" ID/0.039" Constriction, Not Ported
Both are approved for steel and Hevi Shot - Sell for $45 ea plus shipping on line.
$30 each, $60 pair TYD - I shot some skeet with these and the IM was really reaching out there
2) Primos Dead Zone: Decoy $15 and Pass $20 tubes; $35 pair TYD