I think you would be happy purchasing a rifle/bullet combo that is specific to the game being hunted. If you get too big then you may not enjoy the recoil experience and you already have a 243 so going smaller makes no sense. The 300wm is perfect for elk or big muleys, Canadian whitetails, so having one would fill a variaty of situations. Most times we purchase stuff that we think we need and in most cases we already have the guns that fill our needs sitting in the cabinet. I will be the first one to say I purchase firearms just because I don't have that caliber or something I've always wanted from a collecting desire. Bottom line, whatever makes you happy as a hunter and is legal to use go for it and hopefully it's what you expected.