I get 1 in. groups, from my "standard" ARs. Stag 6, with the "heavy stainless barrels" Rock River is another good one. If your going with a "home build", Good luck. Look at Larue. Or Stag.But I reload. The Stag 6 shot 1 in., out of the box. with "plain jane" PMC rounds. Talked to a Guy, here, that got 1/2 in, with reloads, from his Stag-6. I'm "just starting" my reloads, for this gun. Will let ya know. Just wanted to give ya "one more option".Save ya some "head aches".6.5 Creedmoor? You got me I'd go Larue. Then ya WAIT! Why 6.5? What do you want to do?I love to shoot 1/2 in groups. the "cheapest" way, is with a Bolt gun 5R 308 or 223.1170, out of the box. Mag guns are "different". I've been there. Good Luck?Ya want it right. Go with a JD build, and forget the "headaches" Wait for it. These guys "know the tricks". Trust them. Any guy can "build an AR. Some guys know the tricks." I've been a builder, for 35 yrs. Seen Home Depot come in, and try to "talk out" the profesionals. DON"T buy it. You want a good gun?. Don't "hack it", yourself. They know what they're doing.