Personally, I would be a WHOLE lot more concerned with the vents in the blades, and lack of 3:1 working advantage that would inhibit penetration for certain according to Ashbys findings, WAY before id be concerned about machining marks.
As for them heads for the money....it would be a cold day in hades before id spend that amount on a broadhead, when so many great broadheads that conform to Ashbys descriptions are out there for SOOOO much less. These heads do not even fit his description......just sayin. I would send em back in a heart beat and get something like Abowyer's Brown bear, Grizzlys, or Tuff heads. JMO.