World Library  
Flag as Inappropriate
Email this Article

.25 Acp

Article Id: WHEBN0000613981
Reproduction Date:

Title: .25 Acp  
Author: World Heritage Encyclopedia
Language: English
Subject: List of pistols, John Browning, Automatic Colt Pistol, FN Baby Browning, .380 ACP
Collection: .25 Acp Firearms, Colt Cartridges, Pistol and Rifle Cartridges
Publisher: World Heritage Encyclopedia
Publication
Date:
 

.25 Acp

.25 ACP
.25 ACP cartridge with scale
Type Pistol
Place of origin Belgium
Production history
Designer John Browning
Designed 1905
Specifications
Case type Semi-rimmed, straight
Bullet diameter .251 in (6.4 mm)
Neck diameter .276 in (7.0 mm)
Base diameter .278 in (7.1 mm)
Rim diameter .302 in (7.7 mm)
Rim thickness .043 in (1.1 mm)
Case length .615 in (15.6 mm)
Overall length .91 in (23 mm)
Rifling twist 1:16
Primer type Boxer small pistol
Ballistic performance
Bullet weight/type Velocity Energy
35 gr (2 g) Safety [2] 1,100 ft/s (340 m/s) 94 ft·lbf (127 J)
35 gr (2 g) JHP 900 ft/s (270 m/s) 63 ft·lbf (85 J)
45 gr (3 g) JHP 815 ft/s (248 m/s) 66 ft·lbf (89 J)
50 gr (3 g) FMJ 760 ft/s (230 m/s) 65 ft·lbf (88 J)
Test barrel length: 2 in
Source(s): Guns & Ammo Magazine

The .25 ACP (Automatic Colt Pistol) (6.35x16mmSR) centerfire pistol cartridge is a semi-rimmed, straight-walled pistol cartridge introduced by John Browning in 1905 alongside the Fabrique Nationale M1905 pistol. In more recent years, most pistols available in .25 ACP are also available in a more effective caliber.[1]

Contents

  • Design 1
  • Performance 2
  • Synonyms 3
  • See also 4
  • References 5
  • External links 6

Design

The cartridge was designed by John Browning for early blowback pistols that lacked a breech locking mechanism. The cartridge was designed to duplicate the performance of a .22 long rifle cartridge, when fired from a 2" barrel. The .25 caliber was the smallest case Browning could use, and utilize primer pocket, and sufficient rim. The greased, coated lead bullet design, standard for the .22 long rifle of the day, was replaced with a copper jacketed round nose profile for more reliable feeding in auto loading pistols. The bullet weight was typically 50 grains, keeping with the sectional density of the 40 grain .22 caliber bullet. The cartridge is of semi-rimmed design meaning that the rim protrudes slightly beyond the diameter of the base of the cartridge so the cartridge can headspace on the rim.[2] 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. The .25 ACP achieved widespread use after Colt introduced the Browning-designed Fabrique 1905 vest pocket (sometimes referred to as 1906) to the United States as the Colt Model 1908 Vest Pocket.

Though the .25 ACP was designed for semi-automatic pistols, various .25 ACP revolvers were produced in the early twentieth century by Belgian, French, and German gunmakers such as Adolph Frank and Decker.[3] In the late twentieth century, Bowen Classic Arms produced a custom Smith & Wesson revolver in .25 ACP.[4]

Following World War II, the Italian Lercker machine pistol was chambered for the .25 ACP, but achieved little distribution.

Performance

"Baby" Browning
Modern jacketed hollow point loads for the 6.35 / .25

The use of the .25 ACP allows for a very compact lightweight gun, but the cartridge is relatively short ranged and low powered, putting it in the same class as the .22 LR rimfire cartridge but at a significantly higher cost. Although the .22 LR is slightly more powerful when fired from longer rifle barrels, the .25 ACP is viewed by some as a better choice for personal defense handguns due to its centerfire-case design, which is inherently more reliable than a rimfire cartridge.[1]

Manufacturers have loaded commercial hollow-point bullets to higher velocities than standard 50-grain (3.2 g) full metal jacketed loads. Firearms chambered for the .25 ACP cartridge run the gamut from inexpensive, simply made guns like the Raven MP-25 and Jennings J-25 to higher quality and relatively expensive guns like the Baby Browning, Walther TPH, and Beretta 950 Jetfire. 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
  • 6.35×16mmSR (SR—semi-rimmed)

See also

References

  1. ^ a b Jerry Ahern (2010), Gun Digest Buyer's Guide to Concealed-Carry Handguns, Gun Digest Books, pp. 19–20,  
  2. ^ *Wilson, R. K. Textbook of Automatic Pistols, p.258. Plantersville, SC: Small Arms Technical Publishing Company, 1943. ISBN 978-0-935632-89-7
  3. ^ http://www.littlegun.be/arme%20allemande/artisan%20c%20d/a%20decker%20walter%20gb.htm
  4. ^ Bowen, Hamilton. The Custom Revolver. Privately printed, 2001. ISBN 978-0-9713366-0-5

External links

  • The Reload Bench: .25ACP
  • Ballistics By The Inch .25ACP results.
  • SAAMI Entry
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from iCloud eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.