| 6.5mm Bergmann | ||
|---|---|---|
Bergmann model 1896 in 6.5 caliber |
||
| Type | Pistol | |
| Place of origin | Germany | |
| Production history | ||
| Designer | Bergmann | |
| Produced | 1895 | |
| Specifications | ||
| Case type | semi-rimmed | |
| Bullet diameter | .26 in (6.6 mm) | |
| Neck diameter | .285 in (7.2 mm) | |
| Shoulder diameter | .330 in (8.4 mm) | |
| Base diameter | .368 in (9.3 mm) | |
| Rim diameter | .372 in (9.4 mm) | |
| Case length | .870 in (22.1 mm) | |
| Overall length | 1.230 in (31.2 mm) | |
| Ballistic performance | ||
| Bullet weight/type | Velocity | Energy |
| 76 gr (4.9 g) FMJ | 710 ft/s (220 m/s) | 84 ft·lbf (114 J) |
| Source(s): "Textbook of Automatic Pistols" [1] | ||
The 6.5mm Bergmann is an unusual centerfire cartridge produced for very early self-loading pocket pistols. 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.[1]