Swedish pistol cartridge
The 6.5×25mm CBJ is a firearm cartridge designed by CBJ Tech AB, a Swedish weapon development company based in Kungsbacka, for its CBJ-MS submachine gun/personal defence weapon.
Description.
Named after CBJ Tech AB's founder and president Carl Bertil Johansson, the 6.5×25mm CBJ has the same functional dimensions as the 9×19mm Parabellum and was designed to produce the same recoil and pressures to allow most 9 mm caliber weapons to be converted to 6.5×25mm CBJ with a simple barrel change. Also, because the 6.5×25mm CBJ has the same overall dimensions as the 9×19mm Parabellum, it can be used in the same magazines. The primary loading of the standard ball round fires a saboted , diameter tungsten kinetic penetrator, weighing a total of with the sabot. It has a muzzle velocity of from a barrel with a muzzle energy of . From a barrel, it has a muzzle velocity of with a muzzle energy of , and has good armor penetration out to . The standard saboted tungsten ball, when fired from a length barrel, can pierce of armor plate and leave a diameter entry hole. Against the same plate, both 5.56×45mm NATO SS109 and 7.62×51mm NATO M80 failed to penetrate. From a barrel, the tungsten saboted round has the same trajectory as a 5.56 NATO from an M4 carbine and a velocity of at , which will penetrate CRISAT armor. The 6.5×25mm CBJ brass-jacketed ball rounds are heavier than similar rounds in the FN 5.7×28mm and HK 4.6×30mm.
There are several other 6.5×25mm CBJ bullets other than the sabot in full-caliber. Military rounds include a "spoon-tip" loading that increases the chance of the bullet to cavitate on impact and a cheap training version with a different core material. Police rounds include a high-energy-transfer round that can penetrate CRISAT armor up to , and a frangible round for training and situations requiring minimal barrier penetration. A subsonic armor-piercing round weighs for use with a suppressor.
References.
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