I have heard that about the 835's too. They have a larger ID than your basic 12 gauge, much like the Browning BPS I shoot. I read that they tend to like a more open choke due to the increased bore diameter, BUT, have found that I get my best results with Hevi-shot through a .665 tube.

I've tried turkey chokes ranging from .655, .660, .670, 675, and the stock .695, with the .660 and .665 being the top performers with the Hevi-shot. Specifically #6 shot in their 1 7/8 ounce load, 3 1/2" shells.

The .660 and .665 tubes were almost identical, both were devastating, but the .665 was a tad bit more uniform at 40 yards. 30 yard patterns were just plain NASTY.

Pick a choke that's rated for Hevi-shot and you'll be good to go. I've shot chokes from Kicks, Hastings, (they are not Hevi-approved), as well as Star Dot, (2) Tru-glos, (one by Bansner - the Strut Stopper), and the stock offering. My gun seems to prefer the non-ported chokes, but that could just be due to barrel harmonics.

Look over at www.nitrocompany.com for what they found works best with your gun. Even though I'm not shooting their Nitro Hevi's, (since I'm too cheap mainly), I have found their predictions on choke constriction per gun to hold true with the Remington Hevi-shot loads as well.