What twist rate does .429 DE use?

.429 DE typically uses a 1:18 twist rate.

What bullet diameter is .429 DE?

.429 DE uses a 0.4291″ (10.9 mm) diameter bullet.

Is .429 DE still in production?

.429 DE is active; typical availability is specialty.

What is .429 DE used for?

.429 DE is primarily used for hunting, self-defense.

Lindcott Armory

Pistol · Not SAAMI standardized

.429 DE

Chambered exclusively in the Desert Eagle's gas-operated rotary bolt action, which tolerates pressures no Browning-tilt pistol could.

Caliber: 0.4291″ · 10.9 mm
Introduced: 2017
Case: Rimless
Parent: .50 AE
Primary use: Hunting, Self-Defense
Status: Active

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VelocityBeing verified

EnergyBeing verified

Typical grains210 · 240 · 300 gr

Identity

Introduced: 2017
Type: Pistol
Origin: United States
Inventor: Magnum Research
Manufacturer: Magnum Research / Star Ammunition
Standard: Not SAAMI standardized
Status: Active
Availability: Specialty

Build

Case capacity: 50 gr H₂O
Twist (typical): 1:18
Primer: Boxer Small Pistol
Case type: Rimless

Pressure & range

Max pressure: 46,000 psi
Eff. range: 100 yd
Recoil: 20–30 ft·lb
Subsonic: Capable

Ballistics

Published velocity/energy data isn't available for .429 DE.

Performance

Best for Withheld until verified

Dimensionscase measurements · scale drawing · size vs familiar rounds

Case dimensions — the scale drawing at the top of the page is built from these.

SAAMI · verified

Measure	mm	in	✓
Bullet ⌀	10.90	0.429	✓
Neck ⌀	11.71	0.461	✓
Shoulder ⌀	13.54	0.533	✓
Shoulder angle	30°	—	✓
Base ⌀	13.79	0.543	✓
Rim ⌀	13.08	0.515	✓
Belt ⌀	n/a
Rim thickness	1.52	0.060	✓
Neck length	6.58	0.259	≈
Case length	32.56	1.282	✓
Overall length	40.64	1.600	✓

Size vs familiar rounds

Drawn at true 1:1 — every case is accurate relative to the others. Absolute size depends on your screen's pixel density, so measuring one against a real ruler may be off. .429 DE is highlighted below.

Factory loads

Verification

Being verified

Advertised FPS, energy, and BC are withheld until loads clear verification.

Reloading costestimate cost per round vs factory

Estimate your cost per round and how it compares to factory. Inputs are yours — nothing is stored.

Powder $/lb Charge (gr) Bullet $/ea Primer $/ea Brass reuses Brass $/ea

Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.

Firearms chambered in .429 DE

3 models in the database chamber .429 DE. Browse all →

Magnum Research Desert Eagle Mark XIX .429 DEMagnum Research Desert Eagle .429 DE 6"Magnum Research Desert Eagle .429 DE

Lineage

Family TreeOpen .429 DE in the interactive cartridge family tree

Connected reference

Loads20 factory loads for .429 DE FirearmsFirearms in .429 DE

History

Introduced by Desert Eagle and Magnum Research in 2017 for the Desert Eagle pistol. Designed to offer .44 Magnum-equivalent performance in the gas-operated Desert Eagle semi-automatic action. Proprietary to the Desert Eagle platform; limited market due to the specialized nature of the host pistol.

FAQs

What twist rate does .429 DE use?: .429 DE typically uses a 1:18 twist rate.
What bullet diameter is .429 DE?: .429 DE uses a 0.4291″ (10.9 mm) diameter bullet.
Is .429 DE still in production?: .429 DE is active; typical availability is specialty.
What is .429 DE used for?: .429 DE is primarily used for hunting, self-defense.

Sources & provenance

Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
Reference Gun Digest Books — Cartridges of the World (Gun Digest Books, F. C. Barnes) · parent_cartridge

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 20 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →