I've shot Russian ammo in mine w/out a problem but I don't recommend it. I got my first one from a Mr. Kang in ATL who imported them from China and had them relined. Most of the ones you see come from China, where they were very popular. He had a wall full of Chinese copies but he wouldn't sell them. I believe he felt them unsafe. Pretty easy to spot a Chinese gun as they were made in shops using files and railroad rails and a lot of them have "tells." One I remember had "Wauser" banner, the Chinese had apparently tried to copy "Mauser" but didn't have the use of letters we use.