3.5" groups, 50 yds, = PERFECT scores
and you can win a lot of matches with "only" 5.5" groups. 2/3rds of the BE match are shot at a mere 25 yds. Same 3.5" 10 ring. clean those stages, stay in the 5.5" 9 ring, you will score 295 out of 300, and that wins a lot of matches, bud. Especially if there's ANY wind, or light issues at all, even at the very toughest levels of competion.
At local or regional matches, cleaning the 25 yds statges, staying in the 8" ring of the 8 ring at 50 yds, will either win or put you into the top 5 finishers. So the "accuracy" of the ammo used is a bs subject, nearly always. The ability of the MAN is always far less than that of the ammo, and nearly always far less than that of the gun, over the firing of lots of rounds, under match stress, one hand unsupported, even with match .22 autos and optical sights.
Only the hunter, using a scope, and a braced firing position, can hope to tell the difference between 1.5" grouping ammo and 2.5" grouping ammo (at 50 yds), and then only because he is not talking about the firing of 90+ rounds, under match stress.