I have a hart barrel in .270 Win on a model 70 Winchester action. I had the bolt face trued, the locking lugs lapped and the new barrel installed at the same time so I can not attest to the improvement with just the barrel itself. I paid $300 for the barrel and so far it has been worth it. From a bench vise and using a remote trigger actuator (eliminating 99% human error) 5 shot groups @ 100 yards can be covered with a dime.