Exactly.
The 6.5's gained their reputation as super-accurate target rounds due to the traditional rifling twist, not any mysterious something about 6.5mm bullets. Until recently not many hunters were interested in shooting past 500 yards, where BC doesn't matter nearly as much.
In fact out to 500, muzzle velocity is just as important, if not more so, so there's no real external ballistic advantage in long, heavy bullets--though there can be when they hit game.
A lot of people "know" the 6.5's are somehow more accurate the .25's or .270's, but that simply isn't so. Accuracy is due to good bullets, fine barrels, etc. etc., not some magic bore diameter.
