I agree Sheridan. But I also like to lean on the side of caution. And if those areas in the bore are due to forging defects then the barrel could be flawed and be dangerous. You don't know what else is lying below the surface. I would really want it checked out. Yes the accuracy is fantastic but is it worth the risk of a barrel rupture?
I'm only saying this because Ron stated that the rifle looked unfired. If that were the case then there shouldn't be any corrosion in the bore.