This is a .375 H&H magnum barrel from a 1950 Model 70 rifle.
Bluing - 85% - The original finish has some wear and fading throughout the length, with notable wear on the bottom on the barrel, under the stock.
Metal - Overall, this barrel is in very good condition. There are no significant marks of metal damage.
Bore - 7/10 - The bore has almost no wear in the throat and the rifling is bright and smooth, but there is some pitting throughout the length of the bore. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE