The brass will fit, but the 9x23 Winchester is loaded to a much higher pressure. Your pistol may not handle the increased pressure.
If you're handloading, then you can load to 9mm Largo levels in 9x23 Winchester brass, but remember that the 9x23 brass is much thicker than 9mm Largo brass, resulting in less volume inside the case.
Starline makes 9mm Largo brass, with is less expensive than 9x23 brass.
Hope this helps.
Fred