This is a standard barrel from a .300 H&H Magnum Winchester Model 70 rifle.
Bluing - 95% - The finish on this barrel shows some light spots of wear.
Metal - Overall, this barrel is in excellent condition. There are no notable marks of metal damage.
Bore - 9/10 - The bore shows almost no signs of wear. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE