First developed to combine the attributes of the 9mm Luger and the .45 ACP, this round is now one of the best handgun hunting cartridges made for semiautomatics. Handgun shooters know that two of the most popular calibers are the 9mm Luger (Parabellum) and the .45 ACP. The latter is slow but makes a big hole, while the faster 9mm tends to lose energy quickly once it hits the target but shoots fast and flat. In a perfect world, a gunmaker would bridge these two rounds to make a fast and hard-hitting bullet. It is this very idea that led...