65BR, I'm a little confused about the bartlein 2B nomenclature.
I do have a barreled action with a 30 cal Bartlein #2 sitting in the safe. The barrel has a 1-inch shank. At 22 inches the OD measures 0.635 inches.
FWIW, I measured my Rock #3 at the same point, and she measures 0.640 inches.
