Frankly, shooting ANYONE, with or without a permit for the weapon, will be likely to create some serious legal problems. If you live in an area that requires a permit for a handgun, then you will likely be prosecuted for that as a separate crime from the shooting. Even if the shooting is found to be legally justified, you have still committed a crime of possession handgun without a permit. Please note that MOST states do not require permits for possession of a firearm- check the laws in YOUR state.
you will be subject to a review by the state chc board. so maybe
Firearms permitting varies depending on where you live. It is best to call your local government or law enforcement office to get the best answer. Most regions separate firearms into categories that include handguns (pistol, revolver), and rifles/shotguns. If you do require a permit where you live to own/use/carry/transport a shotgun, it will likely not be called a "pistol permit."
Something that shoots all the bullets without reloading after one shot
Impossible to answer without knowing who made it.
No, if it was designed to be a single shot, it's a single shot. It needs to be reloaded after each shot.
Impossible to answer without the serial number.
Impossible to answer without the serial number.
AFAIK, Colt never made a single shot pistol
This is a 12 shot tubular pistol. made between 1960-81. Unfortunately you did not state the condition of the pistol, excellent to poor. Is it still working? No estimate of value can be given without this information.
Yes you can. It is all about where you are shot and how it is treated.
What is the value of a Davis Derringer pistol magnum 2 shot?
He shot himself with a pistol.