This is a .300 H&H magnum barrel from a 1952 Model 70 rifle.
Bluing - 95% - The bluing on this barrel shows minimal signs of wear.
Metal - Overall, this barrel is in excellent condition. There are a few light surface scratches but no forms of significant metal damage.
Bore - 8/10 - The bore shows minimal signs of wear, with only minor erosion at the throat of the barrel. The rifling is bright and smooth. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE