Back in the early eighties I belive, I read an extensive article on that very subject in either muzzleloader magazine or muzzl blast. I do not have the information as to year or month of this article. However it covered in detail this subject as well of some experiences of single shot pistols exploding. Since that time I have always followed that advice so as not to have a dangerous situation. Since my last post I have seen the video of the two young men deliberately overloading a rifle to see if it would blow up. These young men went so far as to load smokeless powder as well. However, they did not use a thin walled musket or a smoothbore pistol. So then if someone would like to do what they did, they thus far have the freedom to do it. I though prefer to stay on the safe side. I have experience being blown up many years ago, and once was enough thank you.