.50 A.E. Load Data & Reloading Guide
Also known as: .50 Action Express, .50 AE, .50 Auto Express
About .50 A.E.
The .50 Action Express (AE) is a powerful handgun cartridge that was introduced in 1988 by Magnum Research, Inc. It was developed in collaboration with Evan Whildin of Action Arms to push the limits of handgun power for the Desert Eagle platform, one of the few pistol designs that can accommodate its large size and intense recoil. The .50 AE was conceived to provide a potent caliber option for firearms enthusiasts desiring maximum stopping power, particularly for large game hunting and silhouette shooting.
The .50 AE cartridge has a rebated rim designed to fit the bolt face of a .44 Magnum, allowing easy conversion on compatible platforms. It features a rim diameter of 0.514 inches and a case length of 1.285 inches. Typically, the bullet diameter is 0.500 inches, and the cartridge overall length is about 1.610 inches. It operates at pressures up to 36,000 psi, producing high velocities despite its large bullet size.
In terms of typical loadings, the .50 AE fires bullets ranging from 300 to 400 grains, achieving velocities between 1,400 to 1,680 feet per second. This results in substantial muzzle energy, making it suitable for hunting large game such as deer and wild boar. Its robust performance also lends itself to specialized competitive shooting disciplines where power and precision are required to knock down steel targets or penetrate dense barriers.
For reloaders, the .50 AE offers distinct advantages despite its demanding characteristics. The cartridge’s large case capacity allows for significant flexibility in powder selection, enabling reloaders to tailor loads for specific shooting needs or preferences. Additionally, the relatively low rate of fire when using a single-action semiautomatic pistol gives reloaders the potential for extended case life, as long as proper attention is paid to annealing, case trimming, and pressure monitoring during the reloading process.
Technical Drawing
Based on C.I.P., the max. allowed case length is 1.285 in / 32.64 mm, the max. cartridge length is 1.594 in / 40.50 mm, and the max. allowed pressure is 33,359 PSI / 2,300 bar.
Technical Specifications
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Start CalculatingBrass Case Capacities
The following table shows the case capacity (Grains of Water) for brass in cartridge .50 A.E. where we have data (number of datapoints in brackets).
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Standard Load Data — .50 A.E.
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.500 | 300gr | Hornady XTP MAG
.500 | 325gr | Speer HP 50AE
.500 | 300gr | Speer Hollow Point Gold Dot
.500 | 300gr | Speer TMJ
.500 | 300gr | H&N FN HS 50AE
.501 | 255gr | Rim Rock SWC
Community Subsonic Loads — .50 A.E.
Loads with muzzle velocity at or below 1,125 fps (343 m/s) — the speed of sound at sea level.
.50 A.E.
Frequently Asked Questions
The maximum pressure for .50 A.E. is 33,359 psi | 2,300 bar.
.50 A.E. typically uses a Large Pistol Magnum (LPM) primer.
The case capacity of .50 A.E. is approximately 51 grains of water (H₂O).