That was one impressive grouping ! For any revolver, of any age ! I am beginning to suspect I was not given the whole Story but a bill of goods on the "evils" of chain fire.
Yet, while they certainly are tasty breakfast fare, I've seen very good shooters produce similar groups using cornmeal as part of their uniform load. I'm not taking sides - just glad I didn't have to clean it after.
However, I used 30, 35, 40, 45 gr of Pondrex w lead balls & wonder wads and never achieved the results Durango did. Maybe I should switch BP ?