WHITE RIVER ENERGETICS PRIMERS – LARGE RIFLE Magnum primers are made in America. Located in a state-of-the-art facility in Arkansas, USA, WRE supports a wide range of domestic and international clients in defense and sporting markets through the manufacture and distribution of primers for small caliber ammunition. Our manufacturing capabilities not only include metallics manufacturing, automated primer mix production and our own proprietary assembly and packaging cells, but the manufacture of smokeless propellant.