[racerham]

In Oregon, it's legal without a CHL under most circumstances as long as:
It's unconcealed, or
It's concealed and not readily accessable.

However, in Portland, your car is defined as a "Public Place", and it is illegal to "knowingly possess or carry a firearm, in or upon a public place" ... "recklessly having failed to remove all the ammunition", so, don't try that in Portland.

The rest of the state's OK...