'''9x25mm Dillon''' is a type of [[ammunition]] for firearms. It is classified as a <span style="color:#0000AA">'''(P)'''</span>istol caliber.
9x25mm Dillon is based on [[10x25mm Auto]], but necked down to accept bullets of the same diameter (.355 / 9mm) as those used in [[9x19mm Parabellum]]. In a certain sense, what this cartridge is to 10mm Auto, [[.357 SIG]] is to [[.40 S&W]], this cartridge is to 10x25mm Auto.
9x25mm is pronounced ''nine by twenty five millimeters''.