Spend an afternoon at rabbit creek and you'd bring that inside 100 yards. Pie plate accuracy is the norm.Of course, if you really want to reduce wounding and loss of animals through regulatory action you'd want some kind of State mandated proficiency test and certification for anyone to shoot anything past, say, 300 yards? Even 300 might be too far.
What percentage of guys shooting their 300 win mags at animals past that range have any business doing so? Much bigger problem than .223 IMO. If you can't put 4 out of 5 in an 8" circle at range x, you shouldn't be shooting at range x regardless of the performance of the bullet.
Put 5 in rapid succession anywhere on your 24x24 target out there at 100 and send it.