This is a .257 Roberts standard barrel, manufactured in 1952.
Bluing - 90% - This barrel shows some minor spots of bluing wear, but the bluing is overall consistent and even throughout the barrel.
Metal - This barrel is in very good condition. There are some minor nicks and scratches in some spots along the barrel, but no major marks of metal damage.
Bore - 7/10 - The bore shows some light signs of wear. The rifling is bright and smooth throughout the length of the barrel, but there is some light heat cracking in the throat of the barrel. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE