Here are a few pics of an Elk and Antelope taken last month in Wyoming using the 338 Snipe-Tac (338-408 imp)
The Elk was shot around 450 yds, the Antelope was over 500yds. The load was 300grn Sierra MatchKing, 3325fps.
Entrance wound was about 1", exit was 5" You can see the exit on the Antelope pic. The Elk took several steps and dropped, the heart was completely gone. Antelope just flipped and dropped. The customer said behind the exit wound of the Elk, the sage brush was red for about 20 feet, you can see it in the pic.