I bet even Wolf ammo would be a step up!
I can honestly say I have never seen a 9X18.
Are they Berdan or Boxer primed? Is reloading an option?
Most of it is Berdan. On the bright side, it was designed to be a top-end blowback pistol round, just enough lighter than 9x19 to not need a recoil system, so cleaning is easy. I bought a box of it because it was cheaper than a chamber gauge, I inherited a Czech Frommer Stop supposedly in .380, but the chamber wa 'way too deep for real 9x17. No idea where Pops got it, he was quite a trader and collector of obbball Euro stuff in his day, wish I still had a couple of pieces I traded on to others years ago (Nothing sexy like Lugers, though, for some reason he was not a fan of full-power autos, more of a rifle guy).