Everyone has had a "take on this"--now let me give you a slight alternative. I purchased an FN Hertzel 5.7X28 semi auto. The bullet, at 5.7mm is, in diameter, essentially a 22 with a rifle like cartridge and bullet shape. The recoil is slightly more than a 22 but very much less than any other competing calibre. The biggest differences are in lethality, velocity, accuracy, certainly low recoil, and capacity. Cost is more but IMO and that of many (others can disagree but they are fooling themselves), this "rifle pistol" firearm is the answer to any questions concerning the effectiveness of a bullet size similar to a 22.