Let see, Obermeyer,Rock,Broughton,Chanlyn,Hart,Shilen,Lawton,Kreiger,Lilja,Spencer,
Kostyshyn,Schneider,Kreiger,K&P,Bartlein,Benchmark are all pretty good barrels. Gunsmith doesn't base chambering cost on barrel cost so I always try and get a good barrel to start with. I've got one rifle chambered with a Douglas and it's an OK barrel and I'm not much into Pac-Nor barrels.
I agree with gunnut69 about gunsmiths. My latest projects I used a Kreiger,Kostyshyn,Chanlyn and Hart in hunting rifles and all are good shooter. Well good luck