6.5×25mm CBJ

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6.5×25mm CBJ
Place of origin Sweden
Production history
Manufacturer CBJ Tech AB
Variants CBJ
CBJ ST (spoon tip)
CBJ HET (high energy transfer)
CBJ subsonic AP
CBJ TRP (training reduced penetration)
CBJ frangible
CBJ Blank
CBJ drill[1]
Parent case 9×19mm Parabellum[2]
Case type Rimless, bottleneck
Bullet diameter 0.157 in (4.0 mm)
Overall length 1.169 in (29.7 mm)
Primer type Large pistol

The 6.5×25mm CBJ is a pistol cartridge designed for the CBJ-MS personal defence weapon.


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 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 9 mm magazines. The primary loading of the standard ball round fires a saboted tungsten 2 g (31 gr) 4.0 mm diameter sub-projectile, weighing 2.5 g (39 gr) with the sabot. It has a muzzle velocity of 730 m/s (2,400 ft/s) from a 120 mm (4.7 in) barrel with a muzzle energy of 533 J (393 ft⋅lb). From a 300 mm (12 in) barrel, it has a muzzle velocity of 900 m/s (3,000 ft/s) with a muzzle energy of 810 J (600 ft⋅lb), and has good armor penetration out to 400 meters. The standard saboted tungsten ball round can pierce 9 mm of armor plate and leave a 6 mm diameter entry hole when fired from a 300 mm length barrel. From a 300 mm barrel, the tungsten saboted round will penetrate CRISAT armor.

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 yaw on impact, and a cheap training version with a different core material. Police rounds include a 2.5 g (39 gr) high-energy-transfer round that can penetrate CRISAT armor at up to 50 meters, and a frangible round for training and situations requiring minimal barrier penetration. A subsonic armor-piercing round weighs 8 g (120 gr) for use with a suppressor.[3]

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