Swipe on brass

[VASCAR2]

The ejector pin can leave marks on the brass prior to significant pressure. If the primer edges are still rounded and not flattened I suspect there is a stout spring under the ejector. With hotter loads the primer fills the void around the edge of the brass case primer pocket and the edge of the primer is less distinct. If the velocities are in line with the published data I’d chalk it up to a strong ejector spring. You can clip a couple of coils off the ejector spring and see if the swipes are diminished.