I guess if we're hijacking, The 8mm is way heavier than the 7.62x39 and is a full power battle rifle round. It would have way more knockdown power at range and is a completely differnt animal than the AK round. If your talking about the shortened 8mm the MP44 fired, it is an intermediate round like the 'x39. The MP44 is on the dust heap of history, the AK isn't.