Worried about new Shilen barrel

[poli]

When I started thinking about building an AR platform I was set for an AR-10, but after I was introduced to 6.5 Grendel and read all the good things about the cartridge I decided to build an AR-15. My goal was to get a good all around AR that can use for hunting and also shoot long range to 1000 yd. The scratches are not cosmetic, they are deep into the metal. I see your reasoning with regards to accuracy but my primary concern was accuracy at long range.