I think that with todays CNC built guns and advanced machining technology, all those "shoot and scrub" theories are just a bunch of jaw flappin by old timers who just want to have something to talk about. "Technically" a gun is NEVER broken in. Each time you pull the trigger a little of the barrel goes with it, so why worry about cleaning an ever changing surface?

As with engines. heat is the enemy of ANY barrel, new or old. So keep the temps down and a simple pass through the barrel with a Boresnake after every shot (or even 2nd one) is sufficient. Every rifle I have had for the last 10+ years have been broken in this way and they drive nails when fed good ammo and kept in reasonable condition.

Good luck,
RA