Just out of curiosity, I wonder who else beside Rem & Ruger might have labeled them that way? IIRC Win. didn't chamber any 280s. (At least that was in print)
JWALL
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VEGETARIAN.........Indian Word For Poor Hunter
Winchester certainly made several varieties of .280...I used to own a synthetic-stocked one, and a friend of mine still has and hunts with a wood-stocked one. There are several other companies that have been there at one time or another, including Browning and Savage.
It's an excellent and very functional cartridge, and deserves its long-term survival.
Dennis