This is a .257 Roberts standard barrel from a 1949 Model 70 rifle.
Bluing and Metal - The bluing has wear and fading with about 85% of the bluing remaining. The metal has some freckling and a few light scratches, but no deep dings or other damage.
Bore - 7/10 - The barrel has almost no wear in the throat, but some pitting, more pronounced near the muzzle, resulting in a rating of 7 out of 10.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE