I mentioned this on another topic, but anyway, I took a nice 5x5 elk a few weeks ago with a .50 cal and 100 gr 777 with the 348 Aerotip (Powerbelt). At a slight angle, the bullet passed through nearly 3 ft of elk and lodged on the opposite side against the hide and the bullet was a near perfect " mushroom" . Almost 100% retention. Prett cool to find the slug in perfect shape. It was only about 80 yards, but when I hit him he side stepped twice and tipped over.