Yes, the Savage has been chambered in 375 length rounds from the factory. Some make Pre-threaded for Savage barrels, such as Pac Nor, Shaw, Shilen & others. You may have to rechamber, but I am sure I saw someone offering this barrel. Yes, use the .532 bolt head, which is interchangeable. But again, why not just get the Allen & I know who can help you with that if you are interested.