swampman'
in some respects the 3 long-action cartridges......30-06, .280, and the .270 are part of a "5-card Straight" that would include the .35 Whelen and the .25-06......if the analogy is palpable.
the .280 is something of a compromise between the .30-06 and the .270, as i see it. it hasn't the bullet weight of the .30 cal', nor quite the velocity of the .270. it fits very well in the middle, however. i mentioned the .308 because of the relatively broad range of bullet weights available for it that have very good ballistic co-efficients as well. but the short-action .308 is not quite as strong of a competitor -- from what i can see -- with the longer-range killing power of the three other cartridges. and with the match-grade projectiles available for the .280 today the .308 does not excell in many competitions any longer either!
the .30-06 isn't really under-rated.........simply because the world's most popular cartridge, by definition, can't be! it's a production-packaged killer for 100 years because it is so well-recognized as such.
take care and Happy New Year to you,
ss'