Notice that the bigger the bore on those kimbers, the lighter the gun. Less metal.
I chose the 308 partly cause of that, but mostly because of bullet selection for handloading and I get brass cheap/free.
That badger is super interesting. Had a 30-30 single shot NEF. It was fun. Not as accurate as bolt guns, so I wonder how this break action does. Uses pointy bullets, which increases range a bit. Could tote it around for small game and use pistol powder subsonic reloads –like using a big 22.