Revision as of 21:40, 25 May 2010 by
Dennis (Talk)
| .25 ACP
|
|
| .25 ACP cartridge with scale
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| Type
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Pistol
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| Country of Origin
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USA
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| Specifications
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| Case Type
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Semi-rimmed, straight
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| Bullet Ø
|
.251 in (6.4 mm)
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| Neck Ø
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.276 in (7.0 mm)
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| Base Ø
|
.277 in (7.0 mm)
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| Rim Ø
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.298 in (7.6 mm)
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| Case Length
|
.62 in (16 mm)
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| Full Length
|
.91 in (23 mm)
|
| Rifling twist
|
1:16
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| Primer
|
Small pistol
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| Production & Service
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| Designer
|
John Browning
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| Design Date
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1906
|
| Ballistic Performance Sampling
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| Bullet Wt./type
|
Velocity
|
Energy
|
| 35 gr (2.3 g) Safety
|
1,150 ft/s (350 m/s)
|
103 ft·lbf (140 J)
|
| 35 gr (2.3 g) JHP
|
900 ft/s (270 m/s)
|
63 ft·lbf (85 J)
|
| 45 gr (2.9 g) JHP
|
815 ft/s (248 m/s)
|
66 ft·lbf (89 J)
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| 50 gr (3.2 g) FMJ
|
760 ft/s (230 m/s)
|
65 ft·lbf (88 J)
|
Test barrel length: 2 in
Source: Guns & Ammo Magazine
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|
The .25 ACP (Automatic Colt Pistol) (6.35x16mmSR) centerfire pistol cartridge is a semi-rimmed, straight-walled pistol cartridge designed by John Browning in 1906.
Design
The cartridge was designed for early
blowback pistols that lacked a breech locking mechanism. The cartridge is of semi-rimmed design meaning that the rim protrudes slightly beyond the diameter of the base of the cartridge. A recessed extractor groove allows an extractor to grab the cartridge reliably. It is the smallest centerfire pistol round in production, and is commonly chambered in small, so-called "
vest pocket" pistols. A line of
revolvers produced by the
German firm
Decker were chambered for this cartridge
[1]. However it is probably most popular due to use in the
Colt Model 1908 Vest Pocket and the
Raven MP-25.
Performance
The use of the .25 ACP allows for a very compact lightweight gun, but the cartridge is short ranged with regards to power, putting it in the same class as the .22 LR rimfire cartridge. Although the .22 is slightly more powerful when fired from equal length short barrels, the .25 ACP is viewed by many as a better choice for personal defense due to its more reliable semi-rimmed centerfire case design. Manufacturers have loaded commercial hollow point bullets to higher velocities than the standard 50-grain (3.2 g) FMJ load. Both rounds certainly pose an effective psychological threat against attackers not armed with a firearm. Firearms chambered for the .25 ACP cartridge run the gamut from very cheaply made guns like the Raven MP-25 to very well made and relatively expensive guns like the Baby Browning or Beretta Bobcat. The tiny cartridge has also been used in some precision crafted target pistols.
Synonyms
- 25 Auto
- .25 Auto
- 6.35 mm
- 6.35 mm Browning
- 6.35x16mmSR
See also
References
