This is my second inquiry on this cartridge. Hoping that someone knows about it. It was invented by Frank Barnes, Cartridges of the World - fame, and used on experimental bases by our military in Vietnam. Factory ammunition was produced for it, however in 1984 or 1985 all remaining ammunition was destroyed. Does anyone have an original round that they can post a photo of? Does anyone know what the head stamp said or how they were packaged? Enclosed is a photo of a ‘made to specifications’ round that I loaded to original specifications standing next to a .458 Winchester Magnum.