This is a bolt housing made for standard cartridges. It will work with standard calibers from .220 to .358.
The bolt grades between NRA very good and excellent conditions. There are no outstanding marks or blemishes beyond what would be expected from normal use
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE
NOTE: While model 70 bolts may appear to be interchangeable, to safely replace the bolt in a rifle requires the action to be checked for proper headspacing and lug seating. This is a simple procedure which can be performed in a matter of minutes by a qualified gunsmith.