Archers moa is just like everyone who thinks they have a 1/4 or 1/2 moa gun. A lucky 3 shot group doesn't count, no duscounting flyiers, or pulled shots, they all count. I'm probably above average for most hunters, and I struggle to keep 60 touching a 1.5" line at 20.
I'd say a lot can't shoot an indoor 300 NFAA round, that's 60 arrows within or touching a 3 1/8" circle at 20.
To answer the original question, it just depends. For deer I want all my shots including bad to be in a 6-7" circle. Elk I'd say 10-11", also including the bad. So if I can do that at 30, 40, 50.....
That's what I want. I use to read about a pie plate or a paper plate. Distance where you can keep 4/5 in it. I much prefer what I feel is absolute, a repeatable 5/5 day in and day out. It's a lot easier to do it in your backyard than out in the field.