.357 Magnum

.357 Magnum
.357 Magnum ammunition
TypeHandgun, Carbine
Place of originUnited States
Production history
DesignerElmer Keith
Phillip B. Sharpe
Douglas B. Wesson
Designed1934
ManufacturerSmith & Wesson
Winchester
Produced1935–present
Specifications
Parent case.38 Special
Case typeRimmed, straight
Bullet diameter.357 in (9.1 mm)
Land diameter.346 in (8.8 mm)
Neck diameter.379 in (9.6 mm)
Base diameter.379 in (9.6 mm)
Rim diameter.440 in (11.2 mm)
Rim thickness.060 in (1.5 mm)
Case length1.29 in (33 mm)
Overall length1.59 in (40 mm)
Case capacity26.2 gr H2O (1.70 cm3)
Primer typeSmall pistol magnum
Maximum pressure (CIP)44,000 psi (300 MPa)
Maximum pressure (SAAMI)35,000 psi (240 MPa)
Maximum CUP45,000 CUP
Ballistic performance
Bullet mass/type Velocity Energy
125 gr (8 g) JHP Federal 1,450 ft/s (440 m/s) 583 ft⋅lbf (790 J)
158 gr (10 g) JHP Federal 1,240 ft/s (380 m/s) 539 ft⋅lbf (731 J)
180 gr (12 g) HC Buffalo Bore 1,400 ft/s (430 m/s) 783 ft⋅lbf (1,062 J)
200 gr (13 g) Double Tap 1,200 ft/s (370 m/s) 640 ft⋅lbf (870 J)
Test barrel length: 4 in (102 mm) (vented)
Source(s): Federal,[1]

The .357 Smith & Wesson Magnum, .357 S&W Magnum, .357 Magnum, or 9×33mmR (as it is known in unofficial metric designation) is a smokeless powder cartridge with a 0.357 in (9.07 mm) bullet diameter. It was created by Elmer Keith, Phillip B. Sharpe,[2] and Douglas B. Wesson[2][3] of firearm manufacturers Smith & Wesson and Winchester.[4][5] The .357 Magnum cartridge is notable for its highly effective terminal ballistics.

The .357 Magnum cartridge is based upon Smith & Wesson's earlier .38 Special cartridge. It was introduced in 1935, and its use has since become widespread.[6]

  1. ^ "Federal Cartridge Co. ballistics page" Archived 2007-09-27 at the Wayback Machine. federalcartridge.com.
  2. ^ a b Sharpe, Phillip B. (1937). Complete Guide to Handloading. Funk & Wagnalls. pp. 405–406 – via Wayback Machine.
  3. ^ Wood, Keith (May 13, 2015). "10 Things You Didn't Know About Smith & Wesson". americanhunter.org. Retrieved September 20, 2019. Daniel Wesson's grandson, Colonel Douglas B. Wesson
  4. ^ Metcalf, Dick (February 2000). "The 20th Century's Top Handgun Cartridges". Shooting Times. Archived from the original on 2016-03-04. Retrieved 2007-08-22.
  5. ^ Barnes, Frank C. (2006) [1965]. Skinner, Stan (ed.). Cartridges of the World (11th ed.). Iola, WI: Gun Digest Books. p. 299. ISBN 0-89689-297-2.
  6. ^ Hawks, Chuck. "The .357 Magnum". Reloading Information. Guns and Shooting Online.