A small selection of rifle actions with suitable box magazines for a long .280 include the Winchester long action M70 (all variants), Remington M700 Long, Sako long (internal magazine models) or the economical Howa Long action (Weatherby Vanguard). All of these rifles have internal box magazin...
and retains the most energy at longer range. It’s also better suited to using heavier bullets than the other cartridges. However, that comes at the expense of more recoil and the larger diameter case of the cartridge results in a reduced magazine capacity in most rifles. ...