Nathan,
That mark is common and is much less deep than a rifling mark. Rifling marks don't affect ballistics, so that shallower mark won't either. The air boundary layer over the bullet surface in flight is thicker than the depths of these corruptions of the surface.
The mark is down on the ogive because seating the bullet by its ogive should provide better centering of the bullet than pushing it in by the nose does. It should also provide the most consistent amount of bullet jump to the lands, though this depends on the exact bullet used and on how consistently you resize your cases.