Please come back, and bring your husband.
Jennipooh,
Store policy? Contact the owner. Policies are, by definition, flexible, therefore meant to be adjusted when needed, and this appears to be a classic case of that.
Whatever happens, short of a refund and an apology, I would suggest contacting the Better Business Bureau and local Chamber of Commerce and lodging a complaint.
The original post did suggest (reading between the lines) that her spouse hasn't a deep history with firearms, so a Cap and Ball revolver might not be the best choice as a gift.
Sorry I did not see this thread before Christmas. I was looking for another thread when I found this one and am incensed enough that I had to post.
Lastly, and as a last resort, the gun, unfired, new in box is still salable at not too much of a loss.
Lost Sheep
P.S. The CO2 unloader is not the only way to unload the gun without firing it. You can screw a lag bolt into the (soft) lead ball and pull it out. That's how they did it before bottled air.
Black powder is not so corrosive as hydrophilic. Of course, once the water combines with the sulphur, you get sulphuric acid, which does the metal no good at all.
Modern black powder substitutes (pyrodex, et al) are a lot less problematic than the original.
Some people run their (lightly pre-cleaned) gun parts through the dishwasher (not using regular dishwasher soap, however-there is something chemically inadvisable about that). If the dishwasher does not leave them warm enough to air-dry, you can put them in an oven at 250 degrees Fahrenheit for a while. If you have hard water in your area, be sure to rinse in distilled water. You don't want calcium built up on bearing surfaces.