To get back to the original topic, Melvin Forbes (NULA) uses Douglas barrels. I have them on a few hunting rifles and am very happy with them. You don't see them often at BR matches but for a hunting rifle they are just great. They are much better than factory tubes.

However much better a premium barrel is over a factory barrel, most factory barrels will shoot better that their users. A new barrel is fairly far down the list of things to make a hunting rifle more effective.