They all seem to run about the same price. $55 a barrel + shipping. Carlson is $ 185 total but comes with 3 chokes. Rose said he needed .710 OD 1" down muzzel. I have .685. Carlson said .627 3" down muzzel. I'm at .685.
I would be a nervious wreck drilling and threading someone elses shotgun. Hats off to these guys.
