The 9mm is not chambered for 9mm Luger (9X19) but 9mm Makarov (9X18). The 9mm Makarov is better for self defense because it is more powerful, though the hottest 9X18 (Corbon) is only slightly more powerful than Corbon's .380 ACP. The .380 round may be slightly more accurate, inherently, than the 9X18 but I suspect there are big differences in accuracy from Mak to Mak so this point may not be important. Both rounds can be purchased el-cheapo from Wolf/TCW. Overall, I think the answer to your question is that it really doesn't matter. It's just that some serious Makarovniks would say if it ain't chambered for 9X18, it ain't a Mak.