The Kimber Montana is really light in weight. I think that is the issue here- the recoil of a 300 WSM in, say an all up rifle weight of 7.25 pounds or less in the Kimber v a standard rifle weight of 9 pounds or a little more, for instance, in a Winchester 70 Laminate model. The felt kick and muzzle bounce can be substantially greater. A 7 WSM would recoil less but still get the job done on everything in NA with the right bullets with only grizzlies in the gray area.