The .429 DE (10.9x33mmRB) is a cartridge introduced in 2018 by

Magnum Research Magnum Research, Inc. (MRI) was an American privately held corporation based in Fridley, Minnesota which manufactured and distributed firearms. The majority owners, Jim Skildum (President and CEO) and John Risdall (Chairman, COO), had been wit ...

for the

Desert Eagle The Desert Eagle is a trigger (firearms), single-action, Gas-operated reloading, gas-operated, semi-automatic pistol capable of chambering the .50 Action Express, the largest centerfire cartridge of any magazine-fed, self-loading pistol and a nu ...

line of handguns.

Design

The .429 DE is a .50 AE case that is necked down to accept .429-diameter (10.9mm) bullets used in the .44 Magnum. The cartridge features a 25% increase in velocity and 45% increase of energy over a standard 240-grain .44 Magnum load of at . The .429 DE offers increased speed and accuracy over the .50 AE due to its lighter and slimmer projectile. Also, due to its use of the same cartridge design, one can easily convert a .50 AE Desert Eagle to .429 DE with only a barrel change. Though very similar to the obsolete .440 Cor-Bon, it is not interchangeable with that cartridge. The same bolt and magazines can be used with both the .429 DE and the .50 AE-chambered Desert Eagle. In 2021, the .429 DE was accepted into

SAAMI The Sporting Arms and Ammunition Manufacturers' Institute (SAAMI, pronounced "Sammy") is an association of American manufacturers of firearms, ammunition, and components. SAAMI is an accredited standards developer that publishes several A ...

standardization.

References

{{Rebated rim cartridges Rebated rim cartridges Pistol and rifle cartridges Weapons and ammunition introduced in 2018

Design

See also

References