My list would include (in order):
Barnes TSX
Nosler Partition
Nosler AB, Hornady IB or Innerlok

Only way I'd use the Accubond is if it shot noticably better then the first 2. I've used it to harvest both elk and moose from a 7mm rem mag and 338wm. Yes it works but I prefer the slugging of the Barnes TSX on the chance you connect with shoulder bones.

When I used a 270win for such animals my choice was partitions and never was dissappointed. Though they aren't always the easiest to get great groups with like some of the other we have to choose from today.