I would suggest hand loading the TSX if you can find the components. In every rifle that I have used the TSX the length of the loaded cartridge was a big deal as far as accuracy is concerned, and that can only be tailored through hand loading.
I have taken a quite a few elk with a .300 Win. Mag. using the Nosler Partition 180. The Accubond shoots a bit better in my rifles than the Partition, but I have only taken a couple of elk with it so far (it worked just fine).
The Barnes bullets certainly have many fans, and great advertising, but I have had some problems with them. They usually work just great, but I have had some problems with expansion in cases where impact velocity was a bit lower than the TSX likes. As long as the velocity is sufficiently high the TSX is an extremely effective bullet.