Built a 6.5-08, then 6.5-06 back in the 70's, when SAMMI normalized 6.5-08 into 260 I bought a couple different barrels and haven't looked back. My fav ia 260 Proof Carbon 24" on a AI /AX platform, a little heavy but I have shot that out to a mile with 147's. Shot a doe at 485' with 130vld...