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  • 8x63 AP


     
    IDnumber91
    Caliber8x63
    Modelsk ptr m/32 pprj m/39
    Projectile form-
    Projectile weight11,8 gram
    Projectile material-
    Projectile typeArmour piercing
    Colour markingsBlack tip
    V0 mps780 mps
    V0 fps-
    Propellant-
    Propellant weight Gram3,6 gram
    Propellant weight Grain-
    The projectile has a steel core that gives the projectile good penetration on hard targets. The steel core weights 3,2 gram.


     
    IDnumber218
    Caliber8x63
    Model8 mm pbr ptr m/32-40
    Projectile form
    Projectile weight15,7 gram
    Projectile material
    Projectile typeArmour piercing
    Colour markingsBlack tip
    V0 mps725
    V0 fps-
    Propellant
    Propellant weight Gram3,6 gram
    Propellant weight Grain-
    Despite the shortage of tungsten in 1940, an amount of the material is reserved for a development and production of a new 8x63 AP cartridge. An AP cartridge m/39 is already in production, but the penetration capabilities is not considered sufficient. The request for the new AP cartridges comes from both the army and the air force.
    The tungsten is the most relevant material to produce incandescent lamps, the electric light bulbs. It is used as the filament and cannot be exchanges for any other material really, so the prioritization is clear.



    But as there is a shortage of tungsten the production is in small scale. [1]. Small caliber ammunition with a wolfram core is identified through the 15 mm black tip, compared with the "normal" AP with a 5-8 mm black tip of the projectile [2]

    The tungsten projectiles is according to the SAN report of November 1941 to of been tested in Karlsborg. The results were good in the machine gun, but giving a poor accuracy in the rifle m/40 with a "considerately deviation", not giving any tight groups on the fiering range. The already manufactured projectiles cannot be altered, so a recommendation is done to make cartridges of the produced bullets and pack them to be used in the air force machine guns. There is no need of delivering the ammunition to the army before the design is improved.
    There were also thoughts of developing tracer and explosive ammunition with tungsten core, but the ideas were canceled due to the shortage of tungsten in Sweden.

    SAN September 1941 [3]
    The production of the projectile is running at the Luma factory in southern Hammarbyhamnen in Stockholm with a capacity of 120.000 projectiles/ month. The order for 3.000.000 projectiles will with this pace be finalized in about 3 years time.
    At the trials at the Karlsborg factory, the results is good for the machine gun, while with the rifle m/40 the spreading is really large. Tests is performed to modify the rifle.

    SAN report of April 1941 page 2-3
    The intention is to split the order of 3 million cartridges in two, one for KATD and one for KFF.

    KATD has the intention to use the ammunition only for the PV rifle m/40. They want the ammunition to be loaded with normal 8 mm m/32 cases, and put 4 PCS on the same loading clip used for the 6,5 mm m/94 ammunition.

    KFF wish to have their ammunition without loading frames or ammunition belt. They wish to have the ammunition loaded to the same degree as KATD.

    The designation for the cartridge is 8 mm pbr ptr m/32-40 [4]

    The m/40 is on a display on a ammunition board manufaktured 1955 or later. [5]

    As the results is not to satisfaction for rifle m/40, the proposal is made to load the projectiles already produced and deliver those to the airforce. As the projectiles cannot be altered, the army has to wait until the design is finalised. [6]


    [1] Ammunitionsnämndens rapport sid 15
    [2] Amkat 1945 (A03)
    [3] SAN report september 1941 page 5
    [4] SAN report April 1942
    [5] FVM.153253
    [6] SAN report November 1941 page 5



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    The Swedish military ammunition site

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