New Rifle Barrel Break-In Procedure
It will always be argued as to whether this procedure is even necessary on a sporting rifle.
The simple fact is that it cannot hurt a new barrel, but it may very well help it.
So what's to lose... other than some time at the range
You'll need ammo, copper solvent, brushes, and patches.
Fire 1 round - clean - cool : Repeat for 10 rounds
Fire 2 rounds - clean - cool: Repeat for 10 rounds
Fire 3 rounds - clean - cool: Repeat for 9 rounds
You can also consider using a product called Tubb's Final Finish. It's available from Midway, Cabelas, Brownells, etc.