Next year I'm hunting out west for muleys and I think I might head out for elk too. 2015 I am planning on heading to AK to hunt caribou and black bear. Within a few years I also plan to head to AK for grizzly and moose. I am looking for one rifle that will handle all of the above. Right now I'm looking at the Savage 116 Alaskan Brush Hunter in 338WM. Only concern is the 20" barrel. What will be the effective range of this rifle with the 338WM round and a 20" barrel? I'm open to suggestions on other rifles as well. I'm not looking for a custom built rifle though.