Those appear to be chatter marks. They may occur throughout the barrel, but that would remain unknown until the bore is examined with a borescope.
Chatter marks tend to occur more frequently with mass produced barrels, and can appear in both button and hammer forged tubes.
Despite being "obscenely expensive" rifle to the owner, since it is later described as being "a long range rifle in the +1000.00 CND price range" it should be noted that it's price isn't a guarantee of a particularly high quality barrel. At the same time, rifle buyers should not expect to find such marks in any rimfire rifle.
Chatter marks don't always affect accuracy negatively, but they never help. They may cause lead build up. Those marks cannot be made to go away by any means that won't affect performance.
Few rifle barrels that aren't custom made are completely flawless or look perfect. But no one should be expected to be satisfied with a bore that appears to be so obviously flawed by unnecessary machine markings.
What make is the barrel in question?
