determining caliber..
my dads friend gave him a percussion cap single shot pistol a looooong time ago....he gave it to me to put on a shelf i keep all kinds of hunting memories ect..and its been there since....neither of us muzzleloaded at the time...now i do..i flintlock....the gun has no markings at all...single shot full wood about a foot long and its a percussion cap...i just dont know what caliber...not 50...but its smaller then 50....any measurements i can take to get the caliber?? id say 40-45 cal would be right...a pack of round balls and caps and i can be blasting away with that thing....also any idea of a load i should use if i would shot it?? theres no manufacturer or anything marked on it to contact....i dont know what most pistols like that take....what grain also 3fg??i think it would be pretty fun to shot it....just want to do it safe...and would contacted the maker but none is marked or anything...dont know if it was a kit gun someone made from a kit or what....its in working condition and is clean..i took it apart and checked it out.....if you guys need ill take a few pics to show you guys what im working with...thanx alot for all the info....