Quoted:
A friend asked me for some advice he is buying a pistol , He is getting a sig p230 and has a choice of 9x18 or .380 at first he just said it was a 9mm i assumed parabellum but i researched it and it only came in 9x18 which i don't think is the same as 9mm parabellum? so which is the better caliber to recommend?
The P230 was available in a special 9x18mm chambering. NOT the 9x18 Makarov, but another .355" round (like .380/9x17 and 9x19).
ETA: The standard chamberings for the P230 and its successor the P232 are .32ACP (7.65mm Browning) and .380ACP (9x17mm).
ETA2: Does anybody even make dies for the 9x18 Police?