I have a 308 in a newer BAR - with handloads, it is the most accurate rifle own at 1/4 inch MOA (I think it is a fluke). I also own a 30-06 in an old 742 Woodsmaster. I can only get it just under 2" (which is just fine for most hunting situations) but this gun has been very reliable. For one gun I would go with the 30-06 due to how versatile it is.