The ONLY reason which comes to mind, for the reason NOT to get a 10mm, is your possibilty of BIG bear encounters there in NW Montana.
![Sad :(](https://www.gboreloaded.com/forums/Smileys/default/sad.gif)
That having been said, I cannot fault your logic of the G20. I too, while living /hunting/hiking in Colorado, chose the G20 for outddoor use and the G27 for urban protection.
Yes, the 10mm ammunition is getting pricey, however, so are ALL of the factory magnum pistol choices. If your pistol budjet only allows one, I would suggest the G20 with later add ons of conversion barrels in 40S&W and/or 357 Sig. Thus allowing cheaper factory ammo use or reloading lead bullets to get more trigger time and to do double duty as a HD weapon.
Additionally, be sure to check out the G20SF (slim frame). It wasn't available when I got my G20 twenty years ago, and for me it's slightly smaller grip circumferance makes a big differance.
RJ