Let’s talk about your first line of defense, your handgun. I can’t count how many times I’ve read comparison controversies over 9mm versus .45 and lately .40 has been added to the mix. However, I don’t know how many times you’ve read these articles and there are some things you probably haven’t read.
Prior to the “new” bullet technology that came about at the end of the 1990s, the 9mm expanding bullets available gave poor performance. The same was true of .45ACP expanding bullets, but with twice the weight and a much greater diameter than the 9mm, the .45ACP gave very good performance, even with a full metal jacket (FMJ). The new technology quickly allowed 9mm and .45ACP bullets to reliably expand to cause additional trauma to the assailant, but its introduction coincided with that of the .40, and this new round not only caused the 9mm to take a back seat, but almost threw it out of the window.