I'm not saying you can't kill an Elk with something smaller then a 30 cal, Hell someone mentioned that they're mom used a 257 Roberts, I've got one of them to, and it's a great rifle built on a rem 788, it's lite, fast and shoots way better then I do, I use it for deer, or I get out a 25-06, or a 308, I just want everything I can control in my favor ,balanced by how well I can shoot it and the energy required to put that animal down there, rite there, even if it moved at the last second, and my shot wasn't as well placed as I wanted. We all try for the "perfect " shot but sometimes it just doesn't happen the way we hoped or planned, That's why I like to stack the deck in my favor