I killed an elk in 02' using a TC Black Diamond, 50 cal and Powerbelts (believe it was 348grs) with 90grs of Clean Shot. One shot thru the lungs (passthru) from 60yds and elk sprinted 25yds then fell over. Gonna use the exact same rig this year in CO. And found the green plastic belt in the lung area when I was gutting the animal. As with other animals we hunt, it's where you hit em'IMO. Good Hunting!