Been gathering parts for my AR-10 6.5 Creedmore for a long time. Put it together and fired 60 rounds of factory ammo at some gongs a couple months ago. Midwayusa sent me a notification that the 147gr ELDs were in, so I ordered 2 boxes to try. Loaded up a latter test (565yds) for 39-44gr of H4831, because that's all I thought was suitable with the powders I had.

Found a node at 43-43.5... Loaded up 7 with 43.2grs

Shot 1 through the Chrony for 2580fps... Seems slow, but I think I'll live.

Fired the next 6 at the 4x4 sheet @ 565yds just to check a group. Can't get that picture to load, Group was 3 inches high, and spread 6.5 left to right.

Happy enough to go back and make a drop chart and load up some more.

Things started to go south after 600. But I have many excuses, Like I haven't cleaned the barrel since installed. I'm standing shooting over the hood of a truck with bi-pod. I never shoot over 565yds, because I have to put a target on the neighbors place. Yet I'm still happy with the results, and I think Mr. Wile E. Coyote will be in trouble at any reasonable range.

Here's the first 10 at 820yds. All hit paper, the hit in the bullseye is hard to see.

[Linked Image]

I did buy a pound of RL17, I might give that a go, But this load seems reasonably accurate for an AR-10.
Now I just need to time the muzzlebrake, Find the screw I lost for the rear scope ring, and paint it so it doesn't look so stupid. At the rate I work on these projects, Maybe it'll be ready by deer season.