Why didn’t the 5 mm Remington Rimfire Magnum catch on like the .17 HMR has in recent years? Does anyone still chamber this cartridge, and is it even available in a factory load today?
I am trying to figure out what has happened here. I removed the spent primers from three cases. Two have primer pockets with what appears to be thin metal cylinders in them, preventing a small primer from being seated. I would like to reload these cases. What do I have here?