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 mass/type	Velocity	Energy
76 gr (5 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]

References

1 2
- Wilson, R. K. Textbook of Automatic Pistols, pp.256-258. Plantersville, SC: Small Arms Technical Publishing Company, 1943.

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