9mm Winchester Magnum

Type

Handgun

Place of origin

United States

Production history

Designer

Winchester

Specifications

Case type

Rimless, straight

Bullet diameter

.355 in (9.0 mm)

Neck diameter

.379 in (9.6 mm)

Base diameter

.391 in (9.9 mm)

Rim diameter

.394 in (10.0 mm)

Rim thickness

.050 in (1.3 mm)

Case length

1.160 in (29.5 mm)

Overall length

1.575 in (40.0 mm)

Maximum pressure (CUP)

45,000 psi (310 MPa)

Ballistic performance

Bullet mass/type	Velocity	Energy
115 gr (7 g) MC	1,450 ft/s (440 m/s)	537 ft·lbf (728 J)

Source(s): SAAMI

The 9mm Winchester Magnum, which is also known as the 9×29mm, is a centerfire handgun cartridge developed by Winchester in the late 1970s. The cartridge was developed to duplicate the performance of the .357 S&W Magnum in an auto-pistol cartridge.

The first handgun which chambered the cartridge was the Wildey pistol. Since then, Thompson/Center has produced barrels chambered for this cartridge and AMT chambered their Automag III for it too, but the cartridge never reached the popularity enjoyed by other handgun cartridges.

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Wikipedia