Five Paper Wrap Packages containing 100Rounds of Chinese Military 7.62 x 39 Steel Core Ammunition Fresh from a Recently Opened Can $45. These are the desirable copper wash rounds and are headstamped “311 68” for Factory 311 and Year 68. Buy the best Steel Core rounds for your SKS or AK. Chinese steel core ammo was banned by the BATF in a letter to FFL dealers and importers in Febuary,1994. All Chinese ammo was imported till May of 1994 when Pres. Clinton sent a letter to the BATF outlawing imports of Chinese ammo and guns. All Chinese ammo uses bullets made with copper plated steel jackets, so using a magnet is useless because it will be sticking to the steel bullet jacket and not the steel core. The only way to tell if your ammo is steel core is to pull a bullet. Steel core bullets are over 1" long, have a boat tail, and have black sealer on them. In the picture the steel core bullet is on the left and the lead core on the right.