- San Diego County Muzzle Loaders is an NMLRA chartered, black powder shooting club, based in San Diego. Info. on local clubs' matches, upcoming events, muzzleloadig basics & links to blackpowder related sites. muzzleloaders, muzzle loading, flintlocks, caplocks, rendezvous, buckskinning, primitive skills, you name it!www.homestead.com/sdcml