Many years ago, I read an article in a gun magazine. The author explained that one reason he carried a Glock 9mm for SD was that he'd found that semi-automatic pistols tend to be the most reliable when utilizing the cartridge they were originally designed for. Now, I don't have an opinion on this one way or another, mainly because I'm not so sure if it's correct. On the other hand, I'm not so sure it's wrong! But what do you guys think? Would you say that his statement is true? Why or why not?