The "Montana" merely destinguishes the difference between the wood version 8400/84M and the synthetic version(Montana).
If you re-select the .270 wsm after you select one of the other wsm cartridges, it switches to 6lbs 3 ounces. I called the factory on that very questions.
Good luck, I am very sure you will enjoy a kimber if you choose to buy one.
Edited for- I didn't understand your question about why we recommend the Montana vs. the 8400 wood. In reality, it is lighter, the web site is off.
FMP
Last edited by FullMetalParka; 08/03/10.