Patrone 88
Five-round clip with 1888 pattern M/88 ammunition
Type	Rifle
Place of origin	German Empire
Service history
In service	1888–1918
Used by	German Empire
Wars	Boxer Rebellion World War I
Production history
Designer	German Rifle Testing Commission
Designed	1888
Produced	1888–present as 8×57mm I
Variants	8×57mm I and 8×57mm IR (rimmed)
Specifications
Case type	Rimless, bottleneck
Bullet diameter	8.09 mm (0.319 in)
Neck diameter	8.99 mm (0.354 in)
Shoulder diameter	10.95 mm (0.431 in)
Base diameter	11.94 mm (0.470 in)
Rim diameter	11.95 mm (0.470 in)
Rim thickness	1.30 mm (0.051 in)
Case length	57.00 mm (2.244 in)
Overall length	82.00 mm (3.228 in)
Case capacity	4.03 cm3 (62.2 gr H2O)
Rifling twist	240 mm (1 in 9.45 in)
Primer type	Large rifle
Maximum pressure (C.I.P.)	380.00 MPa (55,114 psi)
Filling weight	2.75 g (42.4 gr)
Ballistic performance
Bullet mass/type Velocity Energy 14.6 g (225 gr) FMJ 620 m/s (2,000 ft/s) 2,806 J (2,070 ft⋅lbf)
Test barrel length: 740 mm (29.1 in)

ThePatrone 88 (cartridge 88) orM/88 is arimless bottleneckedriflecartridge. It was a first-generationsmokeless propellant cartridge designed by the GermanGewehr-Prüfungskommission (G.P.K.) (Rifle Testing Commission) as the then-new smokeless propellant introduced asPoudre B in the 1886 pattern8×50mmR Lebel started a military rifle ammunition revolution.

ThePatrone 88 cartridge was loaded with 2.75 g (42.4 gr) of single-base (based onnitrocellulose)smokeless powder.The cartridge was based on a Swiss design and was loaded with a 8.08 mm (0.318 in) diameter 14.6 g (225 gr) round-nosefull metal jacket bullet that wascupronickel plated and reached a muzzle velocity of 620 m/s (2,034 ft/s). The bullet core consisted of 95%lead and 5%antimony. It served as parent cartridge of several 8×57mm rimless and rimmed rifle cartridges.

ThePatrone 88 was adopted by theGerman Empire in 1888 as service cartridge along with theGewehr 1888 service rifle. Reportedly the initial version of the design was of two-piece construction like the11×60mm Mauser and rimmed (so-called M88A, later developed into M88/8R or 8X57 IR hunting cartridge), but then a modern, "cannelured" type of cartridge case was introduced,^[1] which, despite being patented at least as early as 1867 (byJoseph Whitworth),^[2] wasn't used by any military before.

In the original bore the diameter of the lands was 7.90 mm (0.311 in) and the diameter of the grooves was 8.10 mm (0.319 in). In 1894/1895 the bore dimensions were changed in an attempt to improve accuracy and barrel life. The diameter of the lands remained 7.90 mm (0.311 in) and the diameter of the grooves was changed to 8.20 mm (0.323 in). The 8.08 mm (0.318 in) diameter of the bullets thePatrone 88 was loaded with remained however unchanged and accuracy did not improve. As of 1915 thePatrone 88 bullets becametombac plated.^[3][4][5]

In German military service thePatrone 88 was replaced in 1904 and 1905 by theS Patrone a.k.a.7.92×57mm Mauser. Besides theS Patrone chambering, theS Patrone bore (designated as "S-bore") was also dimensionally redesigned: the new bullet with a shorter cylindrical part had reducedbearing surface, which necessitated increasing its diameter to 8.20 mm (0.323 in), the exact diameter of the grooves. TheS Patrone and its new spitzer bullet provided the accuracy and barrel life improvements the German military was looking for. As thebolt thrust of the 7.92×57mm Mauser is relatively low compared to many other service rounds used in the early 20th century, many arms originally chambered for thePatrone 88 could be and were adapted for chambering theS Patrone by reaming out metal from the chamber as it required a wider chamber throat to take the differently shaped and thicker brass of the newS Patrone.

Civilian rifles were also chambered for thePatrone 88. After the adoption of the 7.92×57mm Mauser by the German military, thePatrone 88 was not abandoned by civilian users like hunters. German civilian gunsmiths kept trying to improve the chambering. They took a somewhat similar engineering approach as the German military used, but instead of deepening the grooves and widening the bullet, they reduced the diameter of the lands and grooves whilst leaving thePatrone 88 cartridge itself unchanged. These efforts solved the problems the German military had experienced with thePatrone 88 and resulted and were finalized in what is now known as the8×57mm I chambering,I (or often, albeit incorrectly,J, which is due to visual similarity ofFraktur I to Roman J) standing for GermanInfanterie 'infantry'.

In 1939 theNormalisierungsverordnung (normalization regulation) effectively prohibited the production of non-S-bore/7.92×57mm Mauser chambered arms in Nazi Germany. In post World War II Germany the production of the various preceding chamberings is allowed again, but these chamberings have become rare in post 1939 produced arms.^[4]

The cartridge has a cartridge case capacity of 4.03 ml (62 grains) H₂O.

8×57mm I maximum C.I.P. cartridge dimensions. All sizes in millimeters.

Americans would define the shoulder angle at alpha/2 ≈ 19.1 degrees. The common rifling twist rate for this cartridge is 240 mm (1 in 9.45 in), 4 grooves,Ø of the lands = 7.80 mm (0.307 in), Ø grooves = 8.07 mm (0.318 in), land width = 4.40 mm (0.173 in) and theprimer type is large rifle.

According to the officialC.I.P. (Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives) rulings the 8×57mm I can handle up to 380.00 MPa (55,114 psi) P_max piezo pressure. In C.I.P. regulated countries every rifle cartridge combo has to beproofed at 125% of this maximum C.I.P. pressure to certify for sale to consumers.^[6]This means that 8×57mm I chambered arms in C.I.P. regulated countries are currently (2017) proof tested at 475.00 MPa (68,893 psi) PE piezo pressure.^[6]

The rimless 8×57mm I cartridge has been used as parent case for a rimmed 8×57mm IR variant.^[7]

Wikimedia Commons has media related to8x57 mm Patrone 88.

• Pistol and rifle cartridges
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