Blackhorn 209 - Nitrocellulose based?
Apparently Western Powder has managed to create what amounts to a bulk "smokeless powder" with some potassium nitrate and sulfur added. According to the article, Western Powder also no longer claims Blackhorn 209 is non-corrosive.
http://home.earthlink.net/~manzanovalph/Blackhorn209.pdf
http://www.thefirearmblog.com/blog/2010/06/11/is-blackhorn-209-really-a-smokeless-powder/
Apparently Western Powder has managed to create what amounts to a bulk "smokeless powder" with some potassium nitrate and sulfur added. According to the article, Western Powder also no longer claims Blackhorn 209 is non-corrosive.
http://home.earthlink.net/~manzanovalph/Blackhorn209.pdf
http://www.thefirearmblog.com/blog/2010/06/11/is-blackhorn-209-really-a-smokeless-powder/