I’m hoping that our new Chinese friend can shed some light on an unusual Chinese made cartridge. This 7.62x39mm ball cartridge has a standard copper washed steel case with the headstap “31 90” (and reportedly “31 91” as well) with a green case mouth seal. The projectile has a lead rear core with a space in the front of the jacket that is filled with small, white plastic balls. These first appeared on the US shooter market around 1992-1993. The story that came with these cartridges was that they were from a shipment destined for Iraq that was intercepted during the “Gulf War”. The first ones I saw were in plain brown 20 rd. paper wrappers. Many years later, I found the same cartridges packed on SKS chargers in 30 rd. paper wrapped bundles, each bundle sealed in a clear plastic bag. Years ago I asked Bill Woodin about these. The answer that he got from some Chinese engineers that visited the Lab were that “they were just something we tried”. The packaging suggests that these were military issue loads, not commercial lead core for the US market (due to the steel core ban), but they only are known or one or possibly two years of production. Does anyone know more about these?