European Cartridge Research Association (ECRA)

International Ammunition Association, inc. (IAA)

Asociación Española de Coleccionistas de Cartuchos (AECC - Spanish speaking group of the ECRA)

Nederlanse Vereniging ter Bestudering van Munitie en Ballistiek (NVBMB- Dutch speaking group of the ECRA)

Patronensammler Vereinigung (German speaking group of the ECRA)

Scandinavian Ammunition Research Association (SARA)

New Zealand Cartridge Collectors Club (NZCCC)

MSELECT (to catalog and manage one's cartridge collection. For collectors and ballistics departments)