This is a standard barrel from a .300 H&H Magnum Winchester Model 70 rifle.
Bluing - 85% - The finish on this barrel shows some signs of wear, particularly near the muzzle.
Metal - Overall, this barrel is in very good condition. There are some very light surface defects on the barrel, and a few light scratches, but no notable marks of significant metal damage.
Bore - 7/10 - The bore shows minor signs of regular wear and some light pitting. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE