This is a .375 H&H magnum barrel from a 1956 Model 70 rifle.
Bluing - 85% - There are worn spots in the finish; especially on the bottom of the barrel (hidden by the stock) and on the shank.
Metal - Overall, this barrel is in good condition. There are notable scratches and some shallow pitting.
Bore - 9/10 - Very good condition. The bore has almost no wear in the throat, the rifling is bright and smooth and there is no pitting. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE