I killed a large 6pt bull elk about two weeks ago in Idaho. Somewhere in the 320 inch range. I used 155 grain scenars in a 308. The shot was 200yds, the bull didn't know I was there. At the shot the bull ran about 15 or 20yds, stopped, and then tumbled down the hill. He was dead in about 5 or 6 seconds after the shot. I hit the bull through both lungs, deliberately missing the shoulders. The bullet hit a rib on the way in, so expansion was immediate. There was a hole through both lungs about the size of a golf ball. What was left of the bullet was under the off side hide. No exit hole. I was amazed at how quick the bull died. The destruction of vitals by the scenar bullet was very impressive.