| 5mm Bergmann | |
| Origin: | German Empire |
| Type: | Pistol |
| Designer: | Bergmann |
| Design Date: | 1894 |
| Production Date: | 1896–1900 |
| Bullet: | .2 |
| Bw1: | 35 |
| Btype1: | FMJ |
| Vel1: | 580 |
| En1: | 26 |
| Balsrc: | "Textbook of Automatic Pistols" [1] |
The 5mm Bergmann is an unusual centerfire cartridge produced for very early self-loading pocket pistols. The case is steeply conical and headspaces on the conical case walls. Early versions (sometimes called the 5 mm Bergmann Rimless) 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. The long bullet was inadequately stabilized and tended to tumble in flight.[1]