Which is better for Self-Defense, Hunting or Plinking? The 9mm and the 22LR are two popular ammunition out in the market. They are different in respect to cartridge sizes. Comparing the two in a head to head is easy when you’re only viewing the size of the caliber. The 9mm is bigger than the 22 round. The .22 rounds have much less energy than 9mm rounds, the powder load is smaller. When fired has less acceleration and kinetic energy. Which means the penetration and knock down power is not in the same class as the 9mm caliber. However, that doesn’t...