Don't worry about breaking it in- your rifle will shoot good the way it is and the 'breaking in' process has at least as many doubters as practicioners. I personally doubt that going through an extensive break-in has much merit.

Just clean the bore and bolt before shooting- run a solvent patch followed by a few dry patches down the bore to remove any oil/grease used to prevent rust while the rifle was being shipped overseas. You can re-oil the barrel afterwards, but remember that les is more and you should run a dry patch down the barrel before shooting it.

Wipe all fo the metal surfaces down with silicone treated cloth to remove fingerprints and to put a fine lawey of oil on the surface. You don't need to do anything with the stock.

Your rifle should be an excellent shooter. I've shot 2 new T3s int he last week- a 270 and a lefthanded 30-06, both shot sub-moa.