I've tried Federal Vital-Shok ammo, with both 140 gr. Barnes TSX and Nosler Accubond bullets.
The Barnes TSX load was crazy accurate out of my custom .280, but velocities were on the slow side. The Nosler Accubond ammo, which is sadly no longer loaded by Federal, is not only very accurate, but produces MV's around 3000 fps out of my 22" barrel.
I stocked up on the Accubond stuff several years ago, at ridiculously low prices, from Midway. I should have a lifetime supply on hand.
I think Federal would do well to resume this loading, IMO.