Sorry it took me so long to get back at ya but here is what my buddy said: (The Barrels I am familiar with are 6 groove Button rifling. I had better luck with criterion over shilen. I had a shilen 6.5-284 and a 260 Remington. They shot well but not as good as Criterion 223 and 6br's. I believe any will shoot well.
The defining factor is in the handloading/load development and shooter practice. Plus a little luck on the quality of the finished barrel That would be a good question for James at Northland.) Hope this helps & like he says, give James a call @ NORTHLAND and see what he says.
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