The range is tremendous, from less than $100 to thousands depending on the maker, history and condition of the gun. New modern muzzle loaders sell at retail for $200 - 400+/- mark and antiques start out less than $100 and go up from there. have a look at the gunbroker.com website or auctionarms.com that should give a good idea of what you are looking for and the value.
No. Felons are prohibited from owning ANY KIND of firearm, including black powder arms.
A with any damascus shotguns only black powder should be used,however rifles may possibly be used after a complete check by a qualified gun smith
Black powder and smokeless powder differ significantly in power. Smokeless powder is more powerful, providing higher velocities and energy compared to black powder. Smokeless powder's cleaner burn and increased efficiency make it the standard propellant for modern firearms, offering better performance and reduced fouling.
Crescent gun co made shotguns under the name of American gun co. The problems is "How old is the shotgun?" Old shotguns where designed to shoot black powder at a much lower barrel pressure than today's gun powder. Old shotguns may literally explode if the wrong powder is used. I suggest that you take it to a gun shop and have them examine it to tell you the condition of the rifle and what shot you can use with it.
Many companies built them in both black and smokeless powder variants. Remington, Ithaca, H&H, Greener, Wadsworth, etc..
There is ammunition made for the damascus barreled shotguns, called black dawge, (yes spelled that way) made by Goex. You may be able to find it locally. If not, Midway USA stocks it as does www.powderinc.com They have 12 GA in both black powder and black powder substitute
In California, individuals without a permit can legally possess up to 5 pounds of black powder or smokeless powder for personal use. However, it's important to check with local laws and regulations regarding storage and transportation of gun powder.
No. Only black powder shells can be used, and even than, it may not be safe to shoot. I load my own with 2 drams of 2f real black powder and 7/8 oz of shot. Have a gunsmith take a look at the gun first.
How much is a old black powder only 45 cal long barrel pistol worth?
Typically 50 to 75 grains of ffG powder.
110 any more you just blow power out of the muzzle.
Chances are that if you overload the charge in a revolver style black powder pistol, you can blow up the cylinder or blow the barrel off the end of the gun.