Tag: biggest rock is best rock

Different bore diameters give rounds different properties. Despite the fact that all three rounds shown here - 7.62x39, 5.6x39 Russian, and 6.5x38 Grendel (two on the right) - all use the same case base and have virtually the same case capacity, they have very different ballistic properties due to their different bore and bullet diameter. 2015-05-17 19_17_31-Inside AK 74 - YouTube