National Muzzle Loading Rifle Association

The NMLRA exists to promote, support, nurture, and preserve NMLRA's and our nation's rich historical heritage in the sport of muzzleloading through recreational, educational, historical, and cultural venues such as match competition, hunting, gun making and safety, historical reenactments, exhibits, museums, libraries, and other related programs

http://www.nmlra.org/
Track of the Wolf

Commercial site with useful information.

 http://www.trackofthewolf.com
Dixie Gun Works

Commercial site with useful information.

http://www.dixiegunworks.com