11mm Pin fire
The production of the pprj (Pansarprojektil) m/41 ammunition was during the 1943-44 period. It was found to be a difficult and expensive ammunition to produce with a cost of 1,20 SEK per round or the equivalent of 24 SEK in today's value. The high price was due to the very limited wartime availability of the core material, tungsten carbide, and to the difficulties associated with the mass production of these metal alloy cores to precision ammunition standards.
|Model||sk ptr m/94 pprj m/41|
|Projectile weight||7,3 Gram|
|Projectile material||Core of tungsten carbide|
|Projectile type||Armour piercing|
|Colour markings||Black tip and primer.|
|V0 mps||950 mps|
|Propellant||Kspkr I/0,55 pbr|
|Propellant weight Gram||3 gram|
|Propellant weight Grain||-|
The only documented indication of the initial use of pprj ammunition is noted in the AmReg 1943 (Navy) catalog. Here it is shown for use with both rifles and all naval machine guns. In the following AmReg 1946 (Navy) publication, however, the pprj round was removed. This short period of listing in the AmReg catalog raises the question if the PPRJ was actually introduced into the navy inventory or if it was only planned?
The ammunition ultimately found use as a special issue to snipers. It is noted that in 1956 that the combat load of each sniper included 40 rounds of pprj along with 40 rounds of sniper grade prj m/41 ammunition. While the pprj ammunition was not quite of sniper accuracy, the armor piercing ammunition did provide the sniper a better capability against hard targets. The accuracy of the pprj is given as within 18cm2 (2.79 sq in) at 100 meters as an average when tested in 200 series of 10 rounds each in the delivery tests. Also, the trajectory is different between the pprj and the standard 6,5 m/41 projectile, so when used the sniper needed to readjust the point of aim. The ammunition was intended against such lightly armored targets as personnel carriers or shields of artillery pieces.
While the pprj cartridge generates a higher Pmax of 3500 atm (51,435 psi) compared to the standard m/41 cartridge that has a Pmax of 3300 atm (48,496 psi), the pprj could be used in all of the 6,5 mm weapons used by the Swedish military.
The V25 of the 6,5 pprj in a m/96 rifle is 950 m/s (3,117 fps) as compared to the V0 of 8x63 pprj that is 810 m/s (2,658 fps).
The penetration capacity of the 6,5 pprj actually proved to be better than that of the more powerful 8x63mm round. The armor piercing tungsten carbide core of the 6,5mm pprj projectile had a better shape for penetrating hard targets.
Test examples of pprj rounds penetration at 100 meters with a 90 degree impact angle results are:
140 mm of concrete
16-17 mm of HB 500 steel armor.
28 mm of HB 130 steel plate.
In the same test at 300 meters with a 90 degree impact angle the results are:
120 mm of concrete
8 mm of HB 500 steel armor.
22-25 mm of HB 130 steel plate.
In 1956 there were a reported 3,800,000 rounds of pprj held in storage.
P M angående 6,5 mm sk ptr m/94 pprj m/41
AmReg 1943 Marinen
AmReg 1946 Marinen
The beautiful sectioned projectile is with courtesy of Wolfgang Gross
Copyright © 2000 Chris
The Swedish military ammunition site
Pcs published: 1