I patterned the new Mossberg in an 18.5" barrel yesterday with three different .660 chokes shooting Longbeard XR 3" #5's.
The Carlson's Longbeard choke was devastating for close shots but wasn't as impressive 30-40 yards. Indian Creek Black Diamond was the winner for me.
The Longbeard were certainly sufficient but I may still get some TSS to run through the chokes too.