Bowjack,
I have a Kimber 8400 Montana. Mine is in 270 WSM. I think that that rifle stands out among the magnums and even standard long action calibers as its lighter than they are.
A 300 WSM in a Montana would do what the 30-06 will and more and if wanted could be loaded down.
The 8400 Montana has a state of the art stock, control round feeding, a M70 type safety also which I really prefer.
I also have three Kimber 84M's more for woods hunting and varmints.
My only regret is that I selected the 270 WSM as it was more popular over the 7mm WSM.