Ok, I'll speak. Regardless of WHAT you use, you still have to hit your target. And I'm sorry, but I'm not buying 20 kills from you (or anybody else) using a Glock under the stress of a life or death self-defense encounter. Period. Much less 20 people armed with cap and ball revolvers with a total round capacity of 120 rounds and a range somewhat exceeding the typical self-defense range by a factor of 10 or more. But, if it's capacity you wish to argue, then the Lefaucheux 20-Round, double barreled 7.65 mm revolver came out in 1823. It was even used in a few instances during the Civil War. However, NONE of this has a single thing to do with the OP's questions and concerns. The OP's question didn't have to do with ego trips or magic high-tech modern firearms. The question he really wanted answered was this: "Is there a general age range or round count that the gun won't become as reliable." He was also not interested in full sized pistols, such as your vaunted 20 round Glock: "I need a small gun that I am able to carry in the summer. The only new guns I have (92fs, Duty P-09, & 75b) are too large to get away with." To that end, what YOU want ("I want the most effective weapon I can possibly obtain in order to meet the goals. Things like that might not be important to you, but they are to ME.") simply does not align with what the OP wants (small, reliable, concealable pistol for easy summer carry). When somebody says "I need a small, reliable gun for summer carry. A full sized pistol is too large for easy concealment", then you don't respond with something akin to "Go out and buy yourself a REAL gun like any modern tac pistol in 10mm or 5.7x28mm (preferably) and learn how to use it." This whole thread started getting derailed as soon as we started deviating from the OP's concerns, and now here we are bickering and belittling "old" or "outdated" or "ancient revolvers", or tech this and tech that. Looking back, my responses to some of these things didn't do much to drag this string back on track. Let's start here and see what we can do about that.