This is a .30-06 Springfield standard barrel from a standard 1951 Model 70 rifle.
Bluing - 95% - This barrel shows minimal signs of bluing wear. There is one small spot on the underside of the barrel where the bluing is completely worn
Metal - Overall, this barrel is in excellent condition. There are a few very minor scratches and nicks in the barrel, but no other significant marks of metal damage.
Bore - 4/10 - The bore shows significant signs of wear. The rifling remains smooth and clearly defined throughout the length of the barrel, but there is an even and consistent layer of pitting in the bore metal throughout the entire barrel. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE