9mm ammo is a type of ammunition that is commonly used in handguns. It is also sometimes used in submachine guns and carbines. 9mm ammo usually comes in two varieties: full metal jacket (FMJ) and hollow-point (HP).
FMJ 9mm ammo is typically cheaper and easier to find than HP 9mm ammo, but it is not as effective for self-defense purposes. HP 9mm ammo is designed to expand upon impact, making it more likely to stop an attacker. As such, it is generally considered to be a better choice for self-defense situations.
Ultimately, the best 9mm ammunition for you will depend on your individual needs and preferences. If you are just starting out shooting, it might be a good idea to try out different types of ammo to see which one you like best. That said, FMJ ammo is a good option for general target shooting and plinking. HP ammo is better suited for self-defense purposes.