The 308 is not picky as a rule (I own one that is picky, but it's an odd ball)
4895, 4064, H335, 748, 4320, Varget, RL-15 <<< (the one that my "picky rifle" likes) BL-C2, AC2230 and AC2495 have all been good for me at one time or another, in one gun or another. Some better and some worse, but few were bad.
The powders that seem to be the most consistently accurate in the various 308s I have owned in the last 40 years or so were 4064, 4895, 748 and RL15
Varget gets wonderful reviews, but in all my 308s most showed me very good accuracy with it, but only one ever gave me it's best accuracy with Varget. That seems opposite of many men I have talked to (many of whom I trust completely, so I have no true explanation for what I have seen, but it IS what I have personally seen with my rifles) On a scale of 1 to 10, Varget has usually given me "8s" but in only 1 rifle, a bull barreled M70 Winchester, did Varget ever give me the best groups I ever got.
In all others I got my tightest groups with other powders. Varget was nearly always good to very good for me, but never "best". Even in my M70 Target rifle, the Varget groups were as good as my 748 and 4064 groups, but not any better.
In the last 10-15 years I sold most of my 308s. Thinking back now I can count 12 of them. The 2 I own now are a Mossberg MVP and an AR10 Type I made myself. The "10" is the picky one, and has been the most challenging 308 I ever owned for accuracy, but I found a load with 180 grain bullets and RL-10 that gives me .650 to .8" consistently at 100 meters, so I quite there. My MVP has never been a "one-holer" but groups of 1-1/8" to 1-1/4 with good grade hunting bullets are normal, and it's never let me down. I have killed several deer, elk and antelope with it and come to like it quite a lot. I use the same load that my AR10ish rifle like sin my MVP and it's not as tight from the Mossberg, but plenty tight enough to kill game with The AR shoots at .8" or a bit less, and the MVP shoots the same loads to about 1-1/4" The very best accuracy I have seen from the Mossberg so far were with 130 grain Barnes TSX and 49.0 or 748. Those shoot to .625" for 5 shots.
Not a lot to go on, but maybe it will be helpful to those that are interested.
