.50 Action Express
Comparison of handgun rounds. .50 Action Express on the left.
Type	Handgun
Place of origin	United States
Production history
Designer	Evan Whildin, Action Arms
Designed	1988
Specifications
Case type	Rebated rim, straight
Bullet diameter	.500 in (12.7 mm)
Neck diameter	.540 in (13.7 mm)
Base diameter	.547 in (13.9 mm)
Rim diameter	.514 in (13.1 mm)
Rim thickness	.060 in (1.5 mm)
Case length	1.285 in (32.6 mm)
Overall length	1.610 in (40.9 mm)
Primer type	Large pistol
Ballistic performance
Bullet weight/type	Velocity	Energy
325 gr (21.1 g) Ball	1,305 ft/s (398 m/s)	1,229 ft·lbf (1,666 J)
Test barrel length: 6 Source: .50 AE loading data at Accurate Powder

The .50 Action Express (AE, 12.7x33mm) is a large caliber handgun cartridge. It was developed in 1988 by Evan Whildin of Action Arms.

In order left to right; 9mm LUGER, 7,62, .357SIG, 10mmAUTO, .40S&W, .45GAP, .50AE

The Magnum Research Desert Eagle was the first handgun chambered for the .50 AE. Among the few commercial handgun cartridges designed that exceed its ballistic performance are the .454 Casull, .460 S&W Magnum and the .500 S&W Magnum.

The actual cartridge has a .547 inch (13.9 mm) diameter base, with a rebated rim that is the same diameter as the .44 Magnum. The case length, at 1.285", is also identical to that of the .44 Magnum. This allows existing .44 Magnum Desert Eagle pistols to be upgraded to the new cartridge with only a barrel change. Original blueprints had been to use .510" diameter bullets (like the .50 BMG), but the polygonal rifling of the final prototype Desert Eagle allowed the .50 caliber bore plug to drop through, thus rendering the gun a destructive device under BATFE regulations. Nominal bullet diameter was reduced to the current 0.500 inch (12.7 mm);

The principal uses of the .50 AE are metallic silhouette shooting and hunting.

Recoil of the .50 AE in the Desert Eagle pistol is substantial, although only marginally more severe than the .44 Magnum, as the auto mechanism smooths the recoil somewhat. The cartridge is quite loud as well, and a distinct flash is apparent, even in daylight. For these reasons, the .50 AE is not a cartridge for the beginner or novice. It is also quite expensive, at over $40 per box of 20 rounds. Other firearms chambered for the .50 AE include the AMT AutoMag V, LAR Grizzly Win Mag, Freedom Arms model 555, Magnum Research BFR.

Performance

SAAMI recommends a maximum chamber pressure of 36,000 psi for the .50 AE. Available factory loads can produce over 1400 ft·lbf (1900 J) of energy.

Currently, only IMI (Samson) and Speer/CCI load .50 AE. New, unprimed brass is available from Starline. Bullets are available from a few different manufacturers.

Most bullets designed for the .500 S&W Magnum are too long for use in .50 AE semi-automatic pistols.

Kinetic energy

6.00 inch (152 mm) barrel

• 21.00 g (325 gr): 425 m/s (1400 ft/s): 1,897 J (1,415 ft·lbf) - CCI/Speer factory load

• 21.00 g (325 gr): 453 m/s (1510 ft/s): 2,207 J (1,646 ft·lbf) - maximum handload

Links

• [ http://www.reloadbench.com/cartridges/p50ae.html The Reload Bench: .50 Action Express]
• [ http://duncanlong.com/science-fiction-fantasy-short-stories/50ae.htm Duncan Long: The .50 Caliber Desert Eagle]

See also

• .50 caliber handguns
• .50 BMG
• .500 Wyoming Express
• List of firearms
• List of handgun cartridges
• List of rifle cartridges