9mm Parabellum

9x19mm Parabellum
Ball and hollow point 9x19mm Parabellum rounds
Type	Handgun
Place of origin	German Empire
Service history
Used by	NATO and others
Wars	World War I -present
Production history
Designer	Georg Luger
Designed	1901
Produced	1902-present
Variants	9 mm NATO 9x19mm Parabellum +P 9x19mm 7N21 +P+ 9x19mm 7N31 +P+
Specifications
Parent  case	7.65x22mm Parabellum
Case type	Rimless, tapered
Bullet  diameter	9.03 mm (0.356 in)
Neck diameter	9.65 mm (0.380 in)
Base diameter	9.93 mm (0.391 in)
Rim diameter	9.96 mm (0.392 in)
Rim thickness	0.90 mm (0.035 in)
Case length	19.15 mm (0.754 in)
Overall length	29.69 mm (1.169 in)
Case capacity	0.86 cm³ (13 gr H2O)
Rifling  twist	250 mm (1 in 9.84 in)
Primer  type	Berdan or Boxer small pistol
Maximum pressure	235.00 MPa (34,084 psi)
Ballistic performance
Bullet weight/type	Velocity	Energy
7.45  g (115.0  gr ) FMJ	390 m/s (1,300 ft/s)	570  J (420  ft-lbs )
8.00  g (123.5  gr ) FMJ	360 m/s (1,200 ft/s)	518  J (382  ft-lbs )
9.1  g (140  gr ) FMJ	305 m/s (1,000 ft/s)	419  J (309  ft-lbs )
9.5  g (147  gr ) JHP +P+	360 m/s (1,200 ft/s)	643  J (474  ft-lbs )
7.45  g (115.0  gr ) JHP +P+	435 m/s (1,430 ft/s)	704  J (519  ft-lbs )
Source: Sellier & Bellot [1] Vihtavuori Reloading Guide 2009 [2] Buffalo Bore [3] C.I.P. [4]

The 9x19mm Parabellum (abbreviated 9x19mm or 9x19) cartridge was designed by Georg Luger and introduced in 1902 by the German weapons manufacturer Deutsche Waffen und Munitionsfabriken (DWM) for their Luger semi-automatic pistol . ^[5] For this reason, it is commonly called the 9mm Luger cartridge, differentiating it from the also-popular 9mm Makarov and 9mm Browning cartridges.

The book Cartridges of the World stated in 2006, the 9x19mm Parabellum is "the world's most popular and widely used military handgun cartridge." ^[6]

The name Parabellum is derived from the Latin : Si vis pacem, para bellum ("If you seek peace, prepare for war"), which was the motto and telegraphic address of DWM.

In addition to being used by over 60% of police in the U.S., Newsweek credits 9x19 pistol sales with making semi-automatic pistols more popular than revolvers. ^[7] The popularity of this cartridge can be attributed to the widely held conviction that it is highly effective in police and self-defense use. ^[8] This cartridge has been shown capable of imparting remote wounding effects known as hydrostatic shock . ^{[9] [10] [11]}

Origins

Georg Luger developed the 9x19mm Parabellum cartridge from Luger's earlier 7.65x22mm Parabellum . In 1902, Luger presented the new round to the British Small Arms Committee as well as three prototype versions to the U.S. Army for testing at Springfield Arsenal in mid-1903. The German Navy adopted the cartridge in 1904 and in 1906 the German Army adopted it as well. ^[6]

The initial cartridge was created by removing the bottleneck of the 7.65 mm Luger cartridge, resulting in a tapered rimless cartridge. The ogive of the bullet was slightly redesigned in the 1910s in order to improve feeding.

To conserve lead during World War II in Germany, the lead core was replaced by an iron core encased with lead. This bullet, identified by a black bullet jacket, was designated as the 08 mE (mit Eisenkern-"with iron core"). By 1944, the black jacket of the 08 mE bullet was dropped and these bullets were produced with normal copper-colored jackets. Another wartime variation was designated the 08 SE bullet and identified by its dark gray jacket, and was created by compressing iron powder at high temperature into a solid material (Sintereisen-" sintered iron").^{[ citation needed ]}

Popularity

After World War I, acceptance of this caliber increased. 9 mm pistols and submachine guns were adopted by military and police users in a number of countries.

The 9x19mm Parabellum has become the most popular caliber for US Law Enforcement agencies, primarily due to the availability of compact pistols with generous magazine capacity utilizing this cartridge. ^[12]

During the period between the early 1980s and the mid-1990s, a sharp increase in the popularity of semiautomatic pistols coincided with the adoption of the Beretta M9 by the US Army. At the time, most police departments were issuing .38 Special caliber revolvers with a six-shot capacity. The .38 Special was advantageous to other options like variants of the M1911 because it offered low recoil, the revolvers were small and light enough to accommodate different shooters, and it was relatively inexpensive.

Possessing superior ballistics to the .38 Special revolver cartridge, the 9 mm is a shorter round, and being an autoloader cartridge is stored in flat magazines as opposed to cylindrical speedloaders or [[clip (ammunition)#, coincided with the escalation of the gun politics debate of the 80's and 90's making 9mm guns a significant factor in the political rhetoric of the time.

The 9mm is also used by law enforcement outside of the United States. On June 14, 2009 the Minneapolis St. Paul Star Tribune reported that Alliant Techsystems, Edina, and Humbert CTTS SAS were awarded an approximately US$14mil contract to provide Speer GoldDot 9mm ammunition to the French Gendarmerie, French Customs, French Corrections and all 250,000 police officers in France. ^[13]

Cartridge dimensions

Unjacketed Lead, full metal jacket, hollow point .

The 9x19mm Parabellum has 0.86  ml (13.3  grains H₂O) cartridge case capacity.

9x19mm Parabellum maximum C.I.P. cartridge dimensions. ^[4] All sizes in millimeters (mm).

The common rifling twist rate for this cartridge is 250 mm (1 in 9.84 in), 6 grooves, ø lands = 8.82 mm, ø grooves = 9.02 mm, land width = 2.49 mm and the primer type is small pistol.

According to the official C.I.P. (Commission Internationale Permanente Pour L'Epreuve Des Armes A Feu Portatives) guidelines the 9x19mm Parabellum case can handle up to 235 MPa (34,083 psi) piezo pressure. In C.I.P. regulated countries every pistol cartridge combo has to be proofed at 130% of this maximum C.I.P. pressure to certify for sale to consumers.
The SAAMI pressure limit for the 9x19mm Parabellum is set at 241.32 MPa (35,000  psi ), piezo pressure. ^[14]
The SAAMI pressure limit for the 9x19 mm Parabellum +P is set at 265.45 MPa (38,500  psi ), piezo pressure.

Performance

An expanded 124 grain 9x19mm Parabellum jacketed hollow point .

The effective range of the 9mm is about 100 m although the bullet does travel and is lethal at longer ranges.

The 9 mm cartridge combines a relatively flat trajectory with moderate recoil . As early as 1986, in the NRA's book Handloading stated that "the modern science of wound ballistics has established beyond reasonable doubt that the 9mm cartridge is highly effective." ^[8]

The energy delivered by most 9 mm loads allows for adequate expansion and penetration with premium JHP bullets. Illinois State Police, Border Patrol, Federal Air Marshals and United States Secret Service favored and used 115 grain +P+ 9 mm loads at 1,300 ft/s for years with excellent results. ^[15] Lethal Force expert Massad Ayoob has stated that the "Tried, Tested, and True" 115 grain +P or +P+ is the best self defense load in this caliber.

The energy of this cartridge is capable of imparting remote wounding effects known as hydrostatic shock in human-sized living targets. ^{[9] [10] [16]} The existence of this phenomenon has been the subject of much debate, especially with respect to handgun cartridges. ^{[17] [18] [19]} However, recent publication of human autopsy results has demonstrated brain hemorrhaging from fatal hits to the chest with 9mm bullets. ^[11]

Improvements and variations

From left to right: .50 Action Express, .44 Magnum, .357 Magnum, .45 ACP, .40 S&W, 9×19 mm Parabellum, .22 Long Rifle .

In addition to the traditional pressure values for this cartridge, there are two main variants that offer different pressure standards than the SAAMI or C.I.P requirements.

9x19mm +P variant

Attempts to improve ballistics of the cartridge came in the early 1990s with the widespread availability of high pressure loadings of the 9 mm cartridge. Such overpressure cartridges are labeled "+P" or in the case of very high pressure loadings "+P+". ^[20] Ballistic performance of these rounds was moderately improved over the standard loadings. In addition, improvements in jacketed hollow point bullet technology have produced bullet designs that are more likely to expand and less likely to fragment than earlier iterations, giving a 9 mm bullet better terminal effectiveness.^{[ citation needed ]}

9 mm NATO variant

The 9 mm cartridge has been manufactured by, or for, more than 70 different countries and has become a standard pistol caliber for NATO and other military forces around the world. Its official nomenclature among NATO users is "9 mm NATO". The 9 mm NATO can be considered as an overpressure variant of the 9x19mm Parabellum that is defined by NATO standards . ^[21] The service pressure Pmax of the 9 mm NATO is rated at 252 MPa (36,550 psi) where C.I.P. rates the 9 mm Luger PTmax somewhat lower at 235 MPa (34,083 psi). The 315.0 MPa (45,687 psi) proofing test pressure used in the 9 mm NATO proof test however equals the proofing test pressure used in the 9 mm Luger C.I.P. proof test.

Russian military overpressure variants

The Russian military has developed specialized 9x19mm cartridges that utilize relatively light bullets at high muzzle velocities for both pistols and submachine guns to defeat body armor . Besides enhanced penetration capabilities these overpressure variants offer a flatter trajectory and lessened recoil. After initial research, conducted since the late 1980s under the codename "Grach", the Russian armed forces adopted two specialized 9x19mm variants. ^[22]

The 7N21 9x19 mm overpressure variant MPa features an armor piercing bullet and generates a claimed peak pressure of 280 MPa (40,611 psi). ^[22] The 7N21 bullet features a hardened (sub-caliber) steel penetrator core, enclosed into a bimetal jacket. The space between the core and jacket is filled with polyethylene, and the tip of the penetrator is exposed at the front of the bullet, to achieve better penetration. The MP-443 Grach and GSh-18 pistols and PP-19 -01, PP90 M1 and PP-2000 submachine guns were designed for usage with this overpressure cartridge. Jane's Infantry Weapons stated in 2003 that the 7N21 cartridge combines the 9x19mm Parabellum dimensions with a 9x21mm Gyurza bullet design and was developed specifically for the penetration of body armor and for the MP-443 Grach pistol, the latest Russian service pistol. ^[23]

In the 7N31 9x19mm overpressure variant the same concept with a similar but lighter bullet that achieves higher muzzle velocity is applied. The 7N31 cartridge was developed in the late 1990s for the GSh-18 pistol. The 7N31 was also adopted for the PP-2000 submachine gun. Its maximum service pressure remains unclear.

Synonyms

• 9x19
• 9 mm
• 9 mm Luger
• 9 mm NATO
• 9x19mm
• 9x19mm NATO
• 9 mm Parabellum
• 9 mm Para

See also

• 9 mm caliber
• List of firearms
• List of handgun cartridges
• List of rifle cartridges
• NATO EPVAT testing
• Hydrostatic shock

References

Source: Wikipedia, the free encyclopedia