I have customers hitting 2900 to 2950 with the 160 gr Accubonds in the 280 AI in 24" pipes pretty comfortably. This is basically identical or slightly higher then many factory loads for the 7mm Rem Mag with the same bullet.
Handloaded the Mag will certainly add another 100 fps to this comfortably .
The 280 AI is a ballistic Twin to the 7mm WSM
with all bullet weights.
It is a lot more round then most believe it to be. For deer, unless you are intentionally looking to hunt past 400 yards I would use the 140 gr Accubond. Would be much quicker and flatter shooting to this kind of range and more then enough terminal performance for any deer, even heavy norther whitetails and mule deer that can push well over 300 lbs on the hoof.
Just another option, as you all know, I never advise against magnum performance but I also know it is not critical to extreme range performance either.