Matt,
It may be etched further out. I only checked the first two inches because I can see it with the naked eye.. It's no erosion. I'm on my 12th or 13th 6.5x284, so I am all to familiar. This shows up as dark spots, viable to the naked eye when you look from the breech. Once we put the Hawkeye in, the lands and grooves look good, very little scale or cracking. Pads drag on it a bit in the throat and the area was verified spotless of copper or carbon when we scoped it.
I could dismiss it as bad metal in the barrel if I hadn't seen it on the barrel extension too.
I will add, the damn barrel still shoots great. We pulled the barrel to do a 7.5 twist Dasher. I may knock off .5" and make a 243win out of it.
Without sending the barrel and my chemicals to someplace for testing, I cannot say 100% for sure that the wipe out w/accelerator caused this, but I want shooters to be aware there is a real possibility that this combination could do some damage.