alyef, you didn't say what the build will be; an AR or bolt rifle? If I were doing a bolt rifle, I'd go for the 6 Creedmoor over the ARC. I have several and LOVE that round for just about every kind of hunting, except the bigger mule deer and up. If you are going for long range whackin, you get more "horsepower" with the CM and hardly any more recoil. Extremely accurate, easiest round to reload, factory ammo (used to be) is more available, I think. (These days ain't hardly any ammo or components available. )