I hadn't heard that at all. I had actually heard that it, and the 280, were two of the better ones to go AI on.
Unfortunately, I think quite a few folks are loading their AIs well beyond safe pressures and relying a little too much on classic pressure signs that actually indicate a load is WAY beyond safe pressures. With my rifle, I'd certainly believe that there isn't much to be gained with 140s.
I haven't tried 160s, as the only ones I've been able to find are RN and while I'm sure they shoot fine, they just don't look sexy enough