I have owned the same Ruger M77 in 30.06 for 20 years. It has served me very well on hunting Whitetails here in Wisconsin. I am planning on doing some western hunting in the next few years for Mule Deer and Elk and am feeling the itch for a new gun. I am thinking of getting a 300 Winn Mag or 300 WSM. Am I gaining that much with these over my good ol .06?