If you are not otherwise prohibited from posessing a firearm, there is nothing illegal in converting a cap-n-ball revolver to a cartridge firing one, in any caliber. Type of propellant does not matter.
Depends on the state... In NY a BP cap and ball gun does not require a pistol permit as long as it is for display purposes only. As soon as you haev powder and shot though it automatically becomes a handgun in the eyes of NY State. This means it must be on you permit, which you must have to even own a handgun in this godforsaken state. Check your own states laws and those you plan on passing through...
He don't know me very well do he (-> has over 40 guns, modern, C&R, and BP)
Thanks. I can't find anything for this state that prohibits it but I was wondering at federal level. Yes, I read the guidelines, etc.. but I just wanted to make sure that I read them correctly .
Yeah, I knew you had one or two, but I thought I would include the "If you are not otherwise prohibited from posessing a firearm," because at least in Texas, that is the only prohibition, which I knew was not a problem for you.