Brian, good question. So here's my answers; two fold, o what skill's required to shoot consistently (85% of the time):
-1/4 moa at 100yds .... With a rest, 10. Without a rest, prone (like Tubb shoots), don't know, never been done (as far as I know, AFAIK).
-1/2 moa at 100yds .... With a rest, 8. Without a rest, prone, don't know, never been done (AFAIK).
-1/2 moa at 300yds .... With a rest, 9. Without a rest, prone, don't know, never been done (AFAIK).
-1/2 moa at 500yds .... With a rest, 10. Without a rest, prone, don't know, never been done (AFAIK).
-1 moa at 1000yds.... With a rest, 9. Without a rest, prone, don't know, never been done (AFAIK).