Most barrel makers that I have seen quoted have stated that barrel break-in procedures are a waste of time and money and can even damage a new barrel (if you use an abrasive compound to "lap" the barrel). That procedure just puts thousands of rounds of wear on a new barrel within a few minutes and may even void a new barrel warranty. I just take the gun out of the box, clean it initially in case the manufacturer has left any "shavings" or other particles in the barrel) and shoot it and clean it normally after every range session.
