After trying them on mule deer this month, I would agree X3. I'm still wondering about game bigger than deer, though. Usually, there are no free lunches in the terminal ballistics game. So heads that make massive large entrance holes will likely give less penetration. So I'm still a little leary for using them on stuff like elk, moose, and bison. But for deer and antelope, they really put them on the ground in a hurry.