German Sig Sauer 930 in 9x18 Ultra; rare caliber?

[becket]

(Note: 230 NOT 930, doh)
Found a very nice Sig 230 in a pawn shop.
It is Chambered in 9x18 Ultra. I have not heard of that type of 9x18 ammo before.
Apparently it was created by Germany for use by the Luftwaffe or something around 1936. In mid-1970’s it was chambered in different handguns (only German companies?) including the Sig 230. It is not interchangablae with other guns with non-Ultra 9x18 loadings . Does that chambering make this a more rare Sig? All my info courtesy of Wiki. Price was $650-$700,
Writing too small without my cheaters

 

[.455_Hunter]

Before the recent troubles, new Fiocchi 9mm Ultra was available just a few clicks away for barely above .380 prices. The round has very similar performance 9mm Makarov.

I would have no problems being armed with a P230 in 9mm Ultra, assuming I had 2 or 3 magazines and ammo was still available for $25ish a box.

 

[Jim Watson]

Just to be a nitpicker, in the 1930s, the Luftwaffe looked at the Walther 9x18 Ultra but it did not go anywhere and ol' Hermann ended up demanding Krieghoff Lugers for his pilots.

In the 1970s, the German police were looking at the 9x18 Police for more power than their usual .32s but that did not catch on, either, and they went with 9mm P from Walther, Sig, and HK; same ammo as their SMGs.

They are not the same round. There are dimensional differences, probably small enough that you could shoot fresh 9x18 Police in your Walther prototype, or original 9x18 Ultra in your P230 or Walther PP Super, if you didn't mind putting wear and tear on a valuable collector's item and shooting up collector ammo.

Yes, Fiocchi calls it 9mm Ultra, but they are wrong, it is really 9mm Police.
J