I just have a question for someone who knows a lot about black powder. I was at a sportsmans warehouse and I asked if I could purchase a black powder revolver and I was told I was able to even though I am not 21 since black powder isn't regulated by the ATF, the gun counter manager said I had to be 21 and kicked me out of the store. Every one I have talked to said I don't have to be 21. Does anyone know what age I have to be to purchase one then?