This is a .300 H&H Magnum standard contour barrel from a Winchester model 70 rifle. It has the #7 front ramp, which was used from 1958-1963.
Metal and Finish - The bluing has a worn patch above the Winchester logo and some wear at the muzzle. There are scattered small scratches and dings, along with a little freckling at the muzzle, but no other notable metal damage.
Bore - 8/10 - The bore has a little throat wear and some scattered light pitting. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE