I strive for 1/2 MOA at any given range. I grew up reading that 1 MOA was sufficient for big game but most gun/hunting magazine writers didn't promote shooting past 300-400 yds, much less 800.
While 1/2 MOA is not record setting accuracy, or required, it's just a self-imposed standard and gives me the confidence I need to make hits at LR.
I practice on paper and steel at 500yds and start feeling a little cocky when I can consistenly produce 2.0 - 2.5" 3-shot group at this distance. To bring me back down to earth I just remember Matt Kline shot a 2.815" 10-shot group @ 1000yds. That's impressive and keeps me humble.