I think 280 is a perfect round but that rifle is made for a bench and not to carry all day long for a week.
My friends love their 7 mag and they are proven killers and can be long range guns.
But I just don’t care about them.
My friends lite weight tikka in 7 mag has a more pop than I’d like when shooting from a bench.
Look up the Ballistics of a premium ammo 140 grain 270win vs standard blue box 7 mag and where they compare at 400 yards.

All of them do something better than the 30-06, but none of them do everything as well.