I would recommend Proof just on their customer service alone...I bought a PR barrel from Stocky Stock on sale. I thought it would have had a threaded muzzle. I was wrong. Called up PR and they said they would thread my muzzle for like $80. I got back a barrel that I thought nothing was done to...until I screwed off the end of the barrel. What a nice job.
Did I mention that this barrel hit an accuracy node at 3150 fps shooting 140 Bergers (Hunters) 28" barrel, 1-8 twist...6.5-284...ridiculously accurate...Pre-fit, Carbon wrap...
ETA...I still have not put a muzzle brake on this rifle...