I could see a 300 H&H, and loading it to potential, but not much past 35 Whelen, 338-06, 30-06, and 280....makes as much sense, to me, as any real need for any other 300 mag. I get the one gun theory, but I've never subscribed to compromising things just for the sake of argument. For bear/moose/elk, surely some .338s or .358s are arguably 'better'? Same for deer/antelope, with sub 300 mags? What's 'enough'?