I shoot the 140 gr. Accubond thru my 270 WSM, for several reasons:
It's extremely accurate,
It has a high BC (.496)- started out at 70 fps slower than the 140 gr. Barnes TSX, it arrives at 400 yards with nearly identical drop, and higher energy,
It has proven itself to me on game.
The 10 gr. more weight may or may not be a slight advantage when shooting larger critters, but it can't hurt.

I'd rather be a free man in my grave, than living as a puppet or a slave....