In my 300RUM, the 200 AB is my current first choice slug. Excellent results with the past 5 game killed at various ranges.
In one 270, the 140 AB and Btip do hit differently, with the Btip hitting an inch lower. This may be a function of seating depth, I'm not certain. I had one bad experience with the 140 AB from this rifle. But in this particular instance, I'm inclined to believe that only a Barnes, Failsafe, or similar bullet would have penetrated better. I still use the AB, but I favor the bigger bullets.
In a large black bear, the 225AB from a 338winmag, did not pass through at 12 yards, but the recovered bullet was mushroomed as advertised. Shot was broadside, bear was 500+ lbs. The bear died where it was hit. I placed a second shot into the spine as it was to me for insurance.