No, the weapon list is fine. That states the names of the magazines, not the names of the projectile.
The name of the magazine (as if you're adding it to a soldiers loadout) is "Handgrenade". The name of the projectile (after a grenade is thrown) is "GrenadeHand".
You just have to be careful of the differences
You can also try using "Grenade", which is a rifle launched grenade...