You might try posting your question under Black Powder and Cowboy Action Shooting.
If that doesn't work, go to
http://www.sassnet.com/cgi-bin/ubbcgi/ultimatebb.cgi.
If that doesn't work, try
http://www.marauder13.homestead.com/...MARLIN1894.htm
and if that doesn't work, I give up.
Hope that helps.