The cold bore challenge is a great data set for this. First round hits are iffy past 400 yards from field positions for most shooters.
Even for the guys who are not most shooters and practice LR regularly... how many of them can consistently make cold bore first round hits past 500 on a potentially moving MOA sized target while sleep deprived, wet and cold with an elevated heart rate from a field expedient position using a sane hunting rig? To my knowledge, there aren't a lot of shooting events in which guys are tested under those circumstances- despite the fact that some or all of those are present in almost every shot opportunity while backcountry hunting.