| .429 DE |
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| Type | Pistol |
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| Place of origin | United States |
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|
| Designer | Jim Tertin |
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| Designed | 2018 |
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| Manufacturer | Magnum Research |
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| Produced | 2018–present |
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|
| Parent case | .50 AE |
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| Case type | Rebated, bottleneck |
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| Bullet diameter | .429 in (10.9 mm) |
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| Case length | (33 mm) |
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| Primer type | Large pistol magnum |
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| Maximum pressure (SAAMI) | 46,000 psi (317 MPa) |
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|
|
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| Bullet mass/type |
Velocity |
Energy |
| 240 gr (16 g) Glacier Ridge JHP |
1,625 fps (495.3 m/s) |
1,407 ft-lbs (1907.6 J) |
| 210 gr (14 g) Glacier Ridge JHP |
1,750 fps (533.4 m/s) |
1,427 ft-lbs (1934.8 J) |
|
| Test barrel length: 6 inches |
The .429 DE (10.9x33mmRB) is a cartridge introduced in 2018 by Magnum Research for the Desert Eagle line of handguns.