.429 DE

The .429 DE is a cartridge introduced in 2018 by Magnum Research for the Desert Eagle line of handguns. The parent cartridge is the .50 AE and it was necked down to .429". The cartridge features a 25% increase in velocity and 45% increase of energy over a standard 240-grain, .44 Magnum load.
Though similar to the obsolete .440 Corbon, it is not interchangeable with that cartridge. The same bolt and magazines can be used as the .50 AE-chambered Desert Eagle.