0722160810bm July 22, 2016 at: 1500 × 838 In: Modern Intermediate Calibers 002: The Soviet 7.62x39mm ← Previous Next → Two 6.5 Grendel rounds and related cartridges. Left to right: 7.62x39mm, .220 Russian, 6.5 Grendel 123gr SMK, Wolf 100gr FMJ.