The 280 is a true rifle loony and handloaders cartridge. Some folks don't have much appreciation for loonies and handloaders. This is where factory ammo along with mass produced chamberings such as the 270 fit in nicely.
And then there is the 7X57 Mauser and the 6.5X55 Swede. Every non Magnum cartridge that has been invented in the last 100 years basically duplicates what was already being done.
From a logical standpoint neither the 280 or 270 made any sense. They both burn more powder while at the same time you see no difference in there ability to take game.
The 270 for many years made little sense whatsoever. It pushed 3100 fps with cup and core bullets that largely were not up to the task at those velocities.
Had Mr Bell at that time decided to perhaps use a 270 instead of the magnificent 7X57 Mr Bell likely would have left this world much sooner and loonies would not read of a non Magnum cartridge that really could do it all.
If not for hype and sales pitch the 270 likely wouldn't exist today
