Worried about new Shilen barrel

[poli]

I hope the Grendel holds its own at 1000 yds. My current long range rifle is a Steyr Mannlicher SSG 69 in .308 bolt action that shoots about 1/2 MOA but it's not an AR and it's a bit on the heavy side. 700m was the longest distance I shot it at. If I ever decide to get an AR-10 it'll be a 260 Rem. In understand that it's unforgiving on the barrel - that's another reason I'm betting on Grendel.

Thank you for the picture, video and detailed instructions LR. Quick question - what compound are you using for polishing? I have IOSSO and Mothers, and some 220 grit Wheeler's that came with the upper lapping tool, but I believe this one is too coarse for the feed ramps.