There are some, small, flies in the ointment. First, although Montana is a shall-issue state, it is done by the county sheriff. Therefore, since the license is not state issued, many other states do not have reciprococity with Montana. Secondly, though there are few bad guys, they do exist and their marksmanship tends to be of a higher order than those who hold their gorks sideways.
900F
Yes the county sheriff issues Concealed Weapon Permits, but right across the top is "State of Montana Concealed Weapon Permit" which is valid throughout the state and reciprocal with many states that have reciprocity laws. Montana also recognizes all other state CWP's that require a background check. The resident crooks may be better shots than typical for those from CA, but we're getting a lot of them up here now too.
The only other state I've ever held a CWP in, Washington, tried to pass reciprocity a few years back but the genius governor Gary Locke said,"we don't want nonresidents carrying concealed weapons because their state requirements might not be as stringent as Washington's". Uh, sure, be 21, pass background check, have money to pay the sheriff. Them's strict requirements. What an ignorant, anti-gun twit.
So the holder of a WA State CWP can carry in Montana, but I can't carry there. OTOH why would I want to go back there anyway.
I've found that native Montanans are pretty friendly except to Californians, Ted Turner, and others who think that they're better, smarter, and generally superior to us po' ignurunt idjits who live here full time. It's pretty easy to tell the non-residents fakin' it too. They've got fancy boots, fancy hats, pressed denims, and fancy shirts just like they think cowboys wear. All hat and no cattle....