This is a .30-06 Springfield standard super grade barrel from a Winchester Model 70 rifle. This rifle dates sometime between 1958-1963.
Bluing - 98% - The bluing on this barrel shows almost no signs or spots of wear.
Metal - Overall, this barrel is in excellent condition. No major 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