I'd second the 284win over the 280ai. Build the 284 on a medium action and it will outclass the 280ai with high bc long bullets with the same amount of powder.I'm waffling between the 7mm-08 and 280ai for my one North American rifle to do it all. I currently live on the east coast and so the 7-08 is really appealing. If I ever move west though, it would be nice to have the juice to take a moose at 400 if required. Maybe I'll get a Tikka T3x in 7-08 for now and if I do move...beautiful cartridge IMO