The sky is falling, the sky is falling!
I can't tell you what to do or not to do, only what my experiences have been
. For decades I have owned and fired over a dozen different old hammer doubles from 16 to 10 gauge. I don't buy wrecks and I don't use smokeless powder. I do use moderate, not maximum, B/P loads that I load myself. All I can say is that it's been a delightful hobby of mine and have had no mishaps over many years and many hundreds of rounds. Am I at risk? Perhaps, but I doubt nearly as much as each time I get behind the wheel and head out onto a highway.