SC Code of Laws for a definitions:
"Pistol" means any firearm designed to expel a projectile and designed to be fired from the hand, but shall not include any firearm generally recognized or classified as an antique, curiosity, or collector's item, or any that does not fire fixed cartridges.
"Handgun" means any firearm designed to expel a projectile and designed to be fired from the hand, but shall not include any firearm generally recognized or classified as an antique, curiosity, or collector's item, or any that does not fire fixed cartridges.
"Antique firearm" means any firearm not designed or redesigned for using rim fire or conventional center fire ignition with fixed ammunition and manufactured in or before 1898 (including any matchlock, flintlock, percussion cap, or similar type of ignition system or replica thereof, whether actually manufactured before or after the year 1898) and also any firearm using fixed ammunition manufactured in or before 1898, for which ammunition is no longer manufactured in the United States and is not readily available in the ordinary channels of commercial trade.
Unless someone can find something else a black powder revolver is an antique firearm and not considered by legal definition a handgun or pistol.
leasantry:
SC Code of Law
Title16 Crimes and Offenses
Chapter 23 Offenses involving weapons
SECTION 16-23-270. Article not applicable to antique firearms. [SC ST SEC 16-23-270]
The provisions of this article shall not apply to antique firearms.
SC Code of Laws
Title 23 Law Enforcement and Public Safety
Chapter 31 Firearms
SECTION 23-31-350. Article not applicable to antique firearms.
The provisions of this article shall not apply to antique firearms.
Therefore :wacko: the laws do not prohibit BP revolvers. Keeping a loaded BP revolver loaded on top of the front seat would be equivalent to have a knocked bow in the front seat. Wonder what the LEOs would do around here?
Where is an inexpensive place to buy black powder revolvers?