system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are 9mm bullets less dangerous than 7.62 or even 5.56 ones? Shouldn’t they deal more damage with bigger size?
gpt
9mm bullets are dangerous.

However they are a handgun round.  They're less aerodynamic and have less power coming out of the barrel.  They're not designed for long-distance flight.

7.62/.308 and 5.56/.223 are rifle rounds.  They have more power out the barrel and are designed for long- distance, accurate engagement.