Well, I shot a cow elk with a .270 AI back in December using the Accubond. Broadside at about 325 yards, the bullet went through both lungs and exited - although I suspect not by much. Elk stumbled about 25 yards and fell over. My only "complaint" was that the bullet appeared to open up fairly fast (like a partition), making a sizeable hole through the ribs, and then settled into a finger size wound channel through the lungs. In contrast, the Swift Scirocco out of the same gun makes a small hole through the ribs - and a pretty big hole in the lungs. End results were pretty good, though.