This is exactly the .30-06 vs. .308 debate taken down .024".
I assume you are thinking bolt guns?
Are you trying to build light rifle(s) to the extent that action length matters? If so, maybe the 7mm-08.
Are you a person who favors heavy for caliber bullets? If so, maybe the .280.
Do you like controlled feed actions? If so, maybe the .280. Not that a 7mm-08 won't feed well. But the rule of thumb is longer is better.
You are really splitting hairs here, so it is going to take more info.
And that is before someone tells you what you really want is a 6.5 Creedmore. To which I would reply "How about a .270?"
Annnnd then, comes the popcorn!
