I got plenty of ammo many years ago from a brother who couldn't use it. Mine is the original 7.62X41 Czech round. I think the 7.62X39 version was called VZ-52/57 or something like that. Most of the 7.62X39 rifles were made that way. Some, which were chambered for the Czech round, we brought into the U.S. and people would lock tight a chambered adapter which allowed them to fire 7.62X39 out of the original gun. I am not sure how safe these adaptors are, the rifles chambered from the beginning for 7.62X39 fetch close to $1000 these days, whereas 7.62X41 like mine go for $250~$400 depending. The VZ cost me right around $325 by the time it was all said and done. They show up at gun shows and on Gunbroker. My bore looks very good... not pitting... light wear.