Re: Barrel for a 6.8
Consider the Rainier Arms Ultramatch barrels, which are Shilen blanks finished by WOA to Rainier specs. Very accurate with a variety of loads; not temperamental at all.
I have owned 2 Rainier UM's, 3 Noveske's, a Bison, and an ARP (all in 6.8, and maybe others that I don't recall at the moment). Accuracy-wise, Noveske is on par with UM, but tend to be more picky about loads. ARP provided the highest velocities. Bison shot very well considering the price.