This is a .220 Swift standard barrel from a 1951 Model 70 rifle. The barrel is stainless steel.
Bluing and Metal - This barrel is in excellent condition with no significant wear or metal defects.
Bore - 9/10 - While these stainless barrels generally do not get pitted, a lot of the .220 Swift barrels show a lot of throat erosion - this one does not. There is a very little throat wear; it's probably one of the best Swift bores we have seen.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE