I found similar with Remington 788 magazines - I have one marked "308 Win" and one marked "243 Win" - I use them interchangeably in either 308 Win Rifle or 243 Win Rifle - they fit and work - I can not find a difference - except the ID stamping on them.
I suspect they would work fine for 260 Rem, 7 mm-08, 358 Win or about anything else based on the 308 Win case, although I do not own any of those in Rem 788.