- .25 ACP
Infobox Firearm Cartridge
name=.25 ACP
caption=.25 ACP cartridge with scale
origin=flagcountry|United States
type=Pistol
service=
used_by=
wars=
designer=John Browning
design_date=1906
manufacturer=
production_date=
number=
variants=
is_SI_specs=
parent=
case_type=Semi-rimmed, straight
bullet=.251
neck=.276
shoulder=
base=.277
rim_dia=.298
rim_thick=
case_length=.62
length=.91
rifling=1:16
primer=Small pistol
is_SI_ballistics=
bw1=35
btype1=Safety
vel1=1150
en1=103
bw2=35
btype2=JHP
vel2=900
en2=63
bw3=45
btype3=JHP
vel3=815
en3=66
bw4=50
btype4=FMJ
vel4=760
en4=65
bw5=
btype5=
vel5=
en5=
test_barrel_length=2 in
balsrc= [http://www.gunsandammomag.com/ballistics/25_auto.html "Guns & Ammo Magazine"]The .25 ACP (Automatic Colt Pistol) (6.35x16mmSR)
centerfire pistol cartridge is a semi-rimmed, straight-walled pistol cartridge designed byJohn 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 [http://www.littlegun.be/arme%20allemande/artisan%20c%20d/a%20decker%20walter%20gb.htm] . However it is probably most popular due to use in theColt Model 1908 Vest Pocket and theRaven 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-rimmedcenterfire case design. Manufacturers have loaded commercial hollow point bullets to higher velocities than the standard convert|50|gr|sing=on 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 theRaven MP-25 to very well made and relatively expensive guns like theBaby Browning or Beretta Bobcat. The tiny cartridge has also been used in some precision crafted target pistols.ynonyms
*25 Auto
*.25 Auto
*6.35 mm
*6.35 mm Browning
*6.35x16mmSRee also
*
List of firearms
*List of handgun cartridges
*6 mm caliber References
* [http://members.shaw.ca/cstein0/revolver.htm Pistol case specifications]
* [http://www.gunsandammomag.com/ballistics/ "Guns & Ammo Magazine" ballistics database]
* [http://www.reloadbench.com/cartridges/p25acp.html The Reload Bench: .25ACP]
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