The only ABs I've been less that thrilled about were the 110gr .257 version. I shot them at 3,00-3,100fps for a few seasons and caught quite a few bullets in 100-150lb deer. The recovered bullets retained a decent bit of weight, but I'm guessing the lack of overall mass and maybe too much frontal area hindered penetration a bit too much for my liking. I ran into the same issue when I shot 95gr NBTs in the .243win. Partitions and E-tips in the 6mm and .25cal stuff have fared much better when seeking a more reliable exit would around heavy cover.
It's funny you mention that. I've seen the same sorts of things with the 110AB. From leaving cavernous wound channels in deer, to being stopped dead in a single milk jug of water shot at 550 yards from a .25-06 (bullet found in the jug, fully expanded), they seem do a lot of damage and not penetrate as much as other AB bullets.
