I've shot Krieger, Bartlein, Lothar Walther, Benchmark, Hawk Hill, K&P, Green Mountain, and a Proof stainless in 6 Dasher, 6.5 Creedmoor, 308, 6XC, 25 Creedmoor, 6 Creedmoor, 300WM, 338LM, etc. Honestly, I can't tell the difference between any of them. They all shot remarkably well, most likely because whomever chambered them did a great job. The only difference I've noticed is the button rifled barrels haven't lasted as long as the cut rifled ones, but even the buttons shot tiny little groups and the life difference wasn't more than 200, from what I remember. All my 6 Creedmoor barrels have been buttons because their life expectancy is short to begin with, so I don't bother spending the extra $200 or so on a cut rifled barrel that'll only last maybe an extra 100 rounds