RE: patterning with mossberg 835 and hevi-shot
Yessir, you're right... I did read a while back that the 835 and their 10 gauge were the same ID. The Browning BPS that I recently aquired is in the same game... the barrel is back-bored like their 10 and the stock BPS turkey choke mic's a .695 constriction.
I've been toying around with chokes when weather permits and thus far, the Remington Hevi-shot 3 1/2 incher #6 shot, 1 7/8 ounce load is way out front. I've narrowed the chokes down to a .665 or .670 for this gun. It's just too cold here right now to do final testing and I've got to gather up a .670 before I can say with reasonable certainty which is going to be the winner. I've sent shells through chokes with ratings of .650, .655, .660, .675, and .695, with all things being out-gunned by the .660. I'm leaning to the 665 in hopes to make the 40 yard pattern more uniform. I'm real happy with what I have, (super concentrated shot groupings), but I *think* I can tweak it a bit more.