8208-XBR is a Fantastic powder with Nos. CC 69 BTHP Bullets. In an 18"' 1-8, Shilen select match AR barrel I get better groups than the gun will shoot with Black Hills 77 red-box. I use Tula 556M primers too, so nothin' fancy. It runs like $1.20 per round ammo for about $.25 / $.30 a shot...Gotta Love It!
My "perfect load" for that gun actually ended being several 1/10 grains Over Book Max...I won't say here, but I felt my way up to it carefully as I noticed groups closing at the highest book charge. YOUR OWN RISK if you go outside of the guides.
Powder is VERY clean, Drops in a Hornady LNL Progressive press within 1/10 th gr., smells great coming out of the can (who here doesn't Love the smell of an extruded powder in the bottle?!), and makes small groups when I do my part.