Depends, does anybody load XTPs for 9x18?
If so, then get whatever ammo uses XTP bullets. It's a solid performer in .380 ACP, so it will perform in 9x18 which is basically .380 ACP's Russian cousin.
Otherwise, Federal Hydra Shok is an okay choice as well.
It's trendy to poo poo .380 ACP and 9mm Makarov these days, but most folks who do so unironically swear by Standard Pressure .38 Special and 9mm Luger as if they're substantially more powerful.