6.5×25mm
| 6.5x25mm CBJ | |
|---|---|
| Type | Pistol |
| 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] |
| Specifications | |
| 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 6.5x25mm CBJ is a pistol cartridge designed for the CBJ-MS personal defence weapon. Capable of use in rebarreled 9 mm Parabellum firearms, the primary loading of the round fires a sabotted 4 mm tungsten sub-projectile.
The 6.5x25mm CBJ has the same functional dimensions as the 9x19 Parabellum and was designed to produce the same recoil and pressures to allow most 9mm weapons to be converted to 6.5x25mm CBJ with a simple barrel change.
Because the 6.5x25mm CBJ has the same overall dimensions as the 9x19 Parabellum, it can be used in 9 mm magazines. 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. By comparison, 5.56 NATO and 7.62 NATO rounds cause little or no penetration to armor of that thickness. From a 300 mm barrel, the tungsten saboted round has the same trajectory as a 5.56 NATO from an M4 carbine and a velocity of 578 m/s (1,900 ft/s) at 300 m (328 yd), which will penetrate CRISAT armor. 6.5x25 CBJ rounds are faster and heavier than both 5.7x28mm and 4.6x30mm.[2][3]
There are several other 6.5x25 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 for minimal barrier penetration. A subsonic armor piercing round weighs 8 g (120 gr) for use with a suppressor.[3]
See also
References
- ↑ Cartridge Information retrieved 24 November 2009
- ↑ Where Next For PDWs? by Anthony G Williams
- ↑ 3.0 3.1 Brugger & Thomet’s MP9 in 6.5×25 CBJ - SAdefensejournal.com, 14 October 2011
External links
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