Considering that the reticles on some of the Russian scopes were made for ridiculously long distances, they might actually be better suited to the 7.62x39. The IP21 with the magnification set at 9x has the hash marks ranged for 900m, 1000m, 1100m, 1200m and 1300m. You would have to run a ballistics program, do a little math and I doubt that the marks would indicate nice neat distances, but in a lot of ways you'd probably have a more functional scope.