I would think it would depend on a couple things.
How good it shoots to begin with, and if what we're seeing is raised.
If the rifle shot MOA groups before, it probably still would as any increase would hardly be noticeable.
If it shot .24 MOA groups before, it might noticeably affect it, because.......
If that is a raised bur or a portion of it is raised, it does not have to be on the inside edge to affect bullet flight if gasses are being disrupted or deflected back at the base of the bullet while exiting the bore.
If it is just indented, probably no effect to accuracy.
Bottom line, as others have said, just shoot it and see how it does.
If it bothers you, it should dress up easily.
JMO