The 6.5mm Bergmann is an unusual centerfire cartridge produced for the 1896 Bergman #3 self-loading pocket pistol.

The case is bottle-necked and steeply conical, and headspaces on the conical case walls.

Early versions were made without any rim or extraction groove; and relied upon blow-back for expulsion of the fired case from the chamber.

Later Bergmann pistols provided an extractor requiring a groove which produced a semi-rimmed case.

This ammunition-related article is a stub.