I've had considerable experience with both bullets, and they penetrate very similarly. The AB doesn't retain quite as much weight, but doesn't open as widely as the A-Frame--and frontal area makes as much difference as weight
My only comment would to be avoid shooting a trophy eland bull in the heavy shoulder bones with either one. They are BIG animals, and I have seen their shoulder joint stop .30-caliber bullets in that weight range. However, wouldn't hesitate to put a monolithic from 180 up in the same place.
