If you build enough of them and use the lightly torqued method, you will get some calls of barrels that have come loose, especially if using a quality recoil lug that does not gaul like the stock one's do. 40 ft lbs minimum. You also want the barrel and action tight to act as one unit, there is more flex at the barrel/action joint then you might think when you fire the rifle.
Barrel threads are a whole other story as most hold the majority of the torque on the first threads with the rear threads along for the ride.
Don't go crazy, but don't leave en too loose. A hard hit with the hammer on the wrench should do, two hits are better.
Read the book "Rifle Accuracy Facts". The amount of flex at the barrel action joint is considerable and kills accuracy. You don't want to go overboard, but do tighten the nut fairly tight.

John K