What is the average chest cavity depth on an elk? I did a load work up today on some Barnes XLC 180gr in .308. The most accurate load was a mid range charge that put the FPS at approx 2440. It shot well under an MOA. I did some research and found that Barnes-X bullets at that weight and velocity penetrate an average of 20.5" and that they opened up as advertised. For the members: What's your opinion on this elk load? Would there be any benefits trying a 165gr XLC instead? Would you prefer a 180gr at 2440 fps or a 165gr at a higher velocity? Keep in mind for elk hunting.