9x23

[PH Racing]

I'm not even sure there is factory ammo from a major manufacturer in this calibre - I've never seen it (I know where to get 9mm Flobert and 455 Webley, even 7.92 Kurz so I'm not really new to odd calibres either)To really shoot a gun in this calibre, you'll need to reload and you'll need an understanding supplier to bring in the brass (new and won't be cheap). Starline sells this brass as 9x23 Super Comp @152.50/1000.

Winchester did produce factory ammo, 125gr Silvertip in one loading and Colt produced a series 80 1911 chambered for it

Someone asked about rechambering a beretta for 9x23....not gonna work, the OAL is waaay too long for a 9x19 framed gun, it will only work in frames designed for 1911 length cartridges, .45 acp, .38 super etc.