This is a .30-06 Springfield featherweight barrel. The manufacturing date falls somewhere between 1957-1963, determined by the 18-line #7 sight ramp.
Bluing - 85% - The bluing is dark but has some worn spots.
Metal - Overall, this barrel is in good condition. There is a scratch about mid-way along the barrel, on the right side.
Bore - 7/10 - The bore has light wear in the throat and a few smaller pits. The rifling is bright and smooth. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE