Long ago I shot a lot of GM308M (168s), and was perfectly good to as much as 600 yds. I did have a precision-manufacturing-oriented friend for a while there who "helped me" reload that brass, and it was mostly cheaper, but really only a little better in accuracy.
Went to 175s largely because I came into a large lot of 2009 (so: good QA!) LC M118LR. It shot exactly as well, but let me reach out even further. So I stuck to that when I used up the last* and did an ammo test. Did... I forget, but 4-5 brands and the GM308M2 was the best of them all.
Black Hills would shoot tighter... 95% of the time. There was always a flier that blew the group. Etc for others. The Fed stuff is great. 1/2 moa if I remotely do my part, out to any range I can manage to hit at (I have done reliable 900 with it, working on further now). I'd feel sadder about being lazy etc for reloading, if it wasn't such very very good ammo.
* actually, I think I have one box if someone wants it for the archives, to test, etc.