Aguila will be the sole producer of the ammo.. at least until if/when the caliber gains traction and other mfr's start producing it.NativeTexan said:5mm Remington is out of production far as I know and a cartridge collector's item anymore. I've heard boxes run north of fifty bucks. It came out in 1970, remember the hype well, same year Remington legitimized the .25-06. In 3 or 4 years, the hype was over and the caliber/rifle was dead. If they brought a revolver out in THIS caliber, good luck on getting ammo for it. LOL!