as I have said before , their is not enough benifit with the Dakota case to justify its cost per case and cost for dies.
Yea its shorter amd fatter than the 7mmRem mag maybe a little faster if you push it but you can get as good if not better accuracy with the 7mmRem Mag and just about as much velocity.
The only real benifit that I saw was that the cases are not belted and its a little bit shorter than the 300 Win mag
(I have the 300Dakota)
Personaly I would go with the 280Ai so you you could use Lapua brass and get longer barrel life or the 7mm WSM
which has proven to be a very accurate round.
Both are easy to load for and you can get close to the same velocities as the bigger 7mm with longer barrel life and if you go the rout of the 280Ai you can always rechamber if you want.