I've used it in the 270 Win. Same speeds as RL 26, and just as accurate. Its a very compressed load to get 2970 with 140 ABs. I haven't tried it with 150's yet.
Side note, I get 3000 with RL 26 & 150s in the 270W, but I think the 140 AB is the best bullet out there for the 270 for BC & integrity.