This is a .308 Winchester featherweight barrel, manufactured in 1953.
Bluing - 905% - The bluing on this barrel shows minimal signs of wear
Metal - Overall, this barrel is in very good condition. There are some very minor scratches across the barrel.
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