From avelocity standpoint, the two calibers are about the same. But the 6MM-284 holds a number of long range accuracy records - including a fairly recent 1,000 yard record that may never be beaten. You don't see the 6MM-06 used for this application. But one certainly has the potential to be a useful hunting rifle. I also like the shorter, fatter powder column in the 6MM-284 case design. Better mousetrap.