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Ammunition details: Gewehr Patrone 11 (7.5mm GP11)   (Created: 22.03.2014, Changed: 23.02.2020)

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Ammunition: Gewehr Patrone 11 (7.5mm GP11) Calibre: 7.5x55 GP11 First Issued: 1911 Permission required:

Description:

ALN (army warehouse number): 591-1100   On 10 January 1913, the Swiss Federal Council approved the two ordinance bills concerning the new rifles (Modell 1911 Infantry Rifle and Modell 1911 Carbine) and the modified rifles (Modell 1896/11 Infantry Rifle and Modell 00/11 Carbine). In the same documents the Gewehr Patrone 11 (7.5mm GP11) was approved.   Compared to the Gewehr Patrone 90 (7.5mm GP 90) 1890 the GP11 has a pointed bullet with rear cone, which consists of a steel jacket and a hard lead core. The case has been extended. Originally it was planned that in case of emergency (war!) the existing weapons (Modell 1889 Infantry Rifle, Modell 1889/96 Infantry Rifle, Modell 1893 Cavalry Carbine, Modell 1900 Short Rifle, Modell 1905 Cavalry Carbine) should have been used to fire the new cartridge (Gewehr Patrone 11 (7.5mm GP11)). After the First World War the shooting of Gewehr Patrone 11 (7.5mm GP11) from the Modell 1889 Infantry Rifle was forbidden by the War Technology Department KTA, because tests showed that the use was too risky due to the weaker breech construction of the Modell 1889 Infantry Rifle.   The rifle cartridges GP90 and GP90/03 could not be used in the new weapon models (from 1911), because they did not fit into the chamber of the weapons set up for Gewehr Patrone 11 (7.5mm GP11). Only the GP90/23 allowed the use in the new guns.   Until the introduction of the Assault Rifle 57 at the end of the fifties a distinction was made between sharp and blind rifle cartridges. After the introduction of the Assault Rifle 57 the following cartridges were designated: - Rifle cartridge (Gw cartridge or GP) for live ammunition (Gewehr Patrone 11 (7.5mm GP11)) - Marker cartridge (Gw Mark Pat) for bullet-free blind ammunition (Gewehr Markierp. (7.5mm Gw Mark Pat 58)) - Blind rifle cartridge for the old blind ammunition with wooden bullet (Blinde Patrone GP11 (7,5 mm bl GP11))   Rifle cartridge models for the ordinance 1911, 7.5 mm GP 11 Introduced by Swiss Federal Council Decrees of 14 July 1911 and 9 May 1913. Pointed bullet which was pressed into the case neck. The transition between case neck and bullet was greased to a width of about 7mm. The primer was pressed in and has a black ring joint. The gas pressure is 3'300 Atü, the pull-out resistance 30kg.   1915 Due to nickel and copper deficiency the bullet jackets were partly unplated and partly bronzed.   1918 - 1921 Due to lack of material, the bullet jackets were partly made of tombac or brass.   1929 The bullet has a groove and was fixed in the case neck by means of a ring strangling. The gas pressure was reduced to 3'100 Atü, the extraction resistance was increased to 50kg.   1931 The detonators were caulked with three points to prevent them from falling out.   1942 The bullet is fastened with four notches (beads) in the case neck. In 1942 the primers were partly caulked again. The gas pressure was increased to 3'200 Atü, the pull-out resistance was doubled to 100kg.   1943 until 1947 Steel sleeves were used due to lack of material.   1950 Sin oxide primers were introduced, the primers were partly green, the ring joint was still black.   1977 The bullet is secured in the case neck by a closed, six-part muzzle choke, the cartridge is sealed by a 5mm wide grease ring.   Markierungen auf dem Patronen-Hülsenboden Auf dem Hülsenboden der Patrone sind die Fabrikationsdaten vermerkt. Folgend die entsprechenden Positionen: Zahl oben (12 Uhr): Monat der Produktion Zahl unten (6 Uhr): Jahr der Produktion Buchstabe links (9 Uhr): Herkunft des Hülsenmaterials Messinghülsen: T: Selve & Co, Thun D: Dornach (Picture) B: unbekannt (Picture) L: unbekannt (Picture, Picture) Aluminiumhülsen: M: Menzikon Stahlhülsen: A: A: Altena (Deutschland) (Picture) B D: B: Borsig (Deutschland) D: Dornach, Lieferung der Näpfchen B T: B: Borsig (Deutschland) T: Selve & Co, Thun, Lieferung der Näpfchen (Picture) F D: F: Fagersta (Schweden) D: Dornach, Lieferung der Näpfchen (Picture) F T: F: Fagersta (Schweden) T: Selve & Co, Thun, Lieferung der Näpfchen F T N: F: Fagersta (Schweden) T: Selve & Co, Thun, Lieferung der Näpfchen N: Normalisiert G D: G: Gerlafingen (Schweiz) D: Dornach, Lieferung der Näpfchen H T: H: Hellefors (Schweden) T: Selve & Co, Thun, Lieferung der Näpfchen (Picture) K T: K: Klöcknerstahl (Deutschland) T: Selve & Co, Thun, Lieferung der Näpfchen (Picture) O D: O: S.R.O. Stahl D: Dornach, Lieferung der Näpfchen (Picture) O T: O: S.R.O. Stahl T: Selve & Co, Thun, Lieferung der Näpfchen (Picture) S D: S: Schwedenstahl D: Dornach, Lieferung der Näpfchen (Picture) S D A: S: Schwedenstahl D: Dornach, Lieferung der Näpfchen A: Aluminiumzusatz (Picture) S T: S: Schwedenstahl T: Selve & Co, Thun, Lieferung der Näpfchen (Picture) U D: U: Uddeholm (Schweden) D: Dornach, Lieferung der Näpfchen (Picture) U T: U: Uddeholm (Schweden) T: Selve & Co, Thun, Lieferung der Näpfchen Buchstabe rechts (3 Uhr): Zeichen der Munitionsfabrik - A: Altdorf - T: Thun - S: Solothurn (selten) (Picture) - R: Rothenburg (selten) Zahl "3" oben links (10 Uhr): unbekannt (Picture) Zahl "4" oben links (10 Uhr): unbekannt (Picture) Buchstabe "B" oben links (10 Uhr) bedeutet, dass die Hülsen aus beschossenen Hülsen hergestellt wurden (Picture). Buchstabe "V" oben links (10 Uhr) könnte "Versuch" bedeuten (Picture). Buchstabe "A" unten links (8 Uhr) bedeutet, dass die Hülsen aus reinem Schrottmessing (Neumetall-Abfällen) hergestellt wurden (Picture). Zahl "2" unten rechts (4 Uhr) bedeutet, dass der Piston (Zündhütchen) verändert wurde (Picture, Picture).

 
 

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