Certainly. Where I am (OR) a black powder gun has roughly the same legal status as a turkey sandwich. My Remington revolver, although obviously a dangerous weapon, is neither firearm nor handgun, legally speaking.
Actually, that's not quite correct. The ORS's don't mention turkey sandwiches, but they do mention black powder guns. You can carry a turkey sandwich into a court room in Oregon, but you can't carry a black powder revolver into a court room in Oregon. There are municipal codes which restrict them more severely than the state statutes.
If I read the Oregon Revised Statutes correctly, it appears that my black powder revolver may be exempt from the concealed carry permit requirements, if some judge hasn't already ruled that the statutes don't say what they actually say. And they do that a lot. But even if no judge has mangled the clear intent of the law, under the municipal code of the city I live in, it is a violation to even open carry my black powder revolver without a concealed carry permit, because my city includes antique firearms and replicas under its definition of "firearm". It is illegal to possess a loaded firearm of any sort in a public place, and this includes in a vehicle on the road, without a concealed carry permit.
While Oregon even exempts people from the concealed carry permit requirements while hunting or fishing, or traveling to or from hunting and fishing, when you go through my town you are breaking the law if you don't first unload that weapon, unless you have a concealed carry permit.
So, yes, the state law pretty much treats black powder revolvers much like turkey sandwiches in most geographic parts of the state, but some judge could have ruled that the law doesn't say what it says, and unless you're sitting in a tree stand with a hunting license during the appropriate season, you could be in violation of local law.
happybrew