If that's what you want, then don't even question. Velocity loss between the two, the 7-08 with the 20" tube is giving up 200-300 fps on the 280, especially when you get to the 160's
I love both but with the style and places I hunt, my 20" 7mm-08 is what I consider near ideal
Just to add to what Chip has suggested,
Respectfully, as far as bullet placement goes, out to sane hunting distances, what's 200 fps.?
I can see, for myself, getting curious if we're talking over 300 fps... (and a harder bullet like some mono metals)
But 200 fps doesn't matter to me in regard to bullet placement.
If we have a 160 NAB leaving said candidates at and velocities 'round about 2600 fps for the 7-08, and 'round 2800 for the 280 then.... that's your 200 fps difference.
Give them both a 200 yard zero and the 7-08 hits about 1 1/2" lower than the 280 at 300 yards, and about 4" lower at 400.
I've ran the 284 Winchester quite a bit (subjective) and killed no small number of Deer when doing so. That cartridge is right in there with the aforementioned 7-08/280.
Were it me, and I realize that not, and I was forced to build on a Remington action, when going "7 mm Something" I'd roll with a 23" barrel on a Short Action given the two options.
You will have other needs, desires and appreciations for what you choose.
I trust you will thoroughly enjoy your 280 Remington, it's all the cartridge a man needs... minus DG.