When I was young my boss bought a BP revolver from some guy and brought it on the job site. The guy he bought it from gave him all the necessary supplies to shoot it except powder. Well I had this bright idea to cut open a shotgun shell that I had in my glove box and use that powder. We thought all powder was black so it was ok. We loaded one shot in the cylinder and fired it off. We found one half of the cylinder over 150yds from where it was shot and the barrel was missing completely. To this day we have no idea how none of us ended up withmetal in us. Morel of the story is I think that most incedents occur from people who have NO clue what they are doing and that no barrell out there will explode under any conditions that we put them in under normal use with the proper supplies and equipment.