What twist rate does .404 Jeffery use?

.404 Jeffery typically uses a 1:16 twist rate.

What bullet diameter is .404 Jeffery?

.404 Jeffery uses a 0.422″ (10.72 mm) diameter bullet.

Is .404 Jeffery still in production?

.404 Jeffery is active; typical availability is common.

What is .404 Jeffery used for?

.404 Jeffery is primarily used for dangerous game, big game.

What are the best powders for .404 Jeffery?

Reloading powders commonly listed for .404 Jeffery include N170, Reloader 25.

Rifle · SAAMI

.404 Jeffery

.404 Rimless NE10.75x73mm

W.J.

Caliber: 0.422″ · 10.72 mm
Introduced: 1905
Case: Rimless
Primary use: Dangerous Game, Big Game
Status: Active

Velocity2,050–2,400 fps

Energy2,795–5,755 ft·lb

Typical grains300 · 400 · 450 gr

Identity

Introduced: 1905
Type: Rifle
Origin: United Kingdom
Inventor: W.J. Jeffery
Manufacturer: W.J. Jeffery & Co.
Standard: SAAMI
Status: Active
Availability: Common

Build

Case capacity: 122 gr H₂O
Twist (typical): 1:16
Primer: Large Rifle Magnum
Case type: Rimless

Pressure & range

Max pressure: 52,939 psi
Eff. range: 300 yd
Max range: 700 yd
Recoil: 60–80 ft·lb

Ballistics

Representative trajectory · 100 yd zero0–800 yd

Open in Ballistic Compare ↗

By real loads: 2,150–2,600 fps · 51 loads
Parent case: —

Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).

Performance

Best for HuntingCutting Edge Bullets Safari350 gr · Raptor HP · 2,500 fpsBuy now →

Buy links open .404 Jeffery ammunition at Rivertown Munitions.

Dimensionscase measurements · scale drawing · size vs familiar rounds

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

CIP TDCC · verified

Measure	mm	in	✓
Bullet ⌀	10.72	0.422	✓
Neck ⌀	11.48	0.452	✓
Shoulder ⌀	13.46	0.530	✓
Shoulder angle	8.5°	—	✓
Base ⌀	13.84	0.545	✓
Rim ⌀	13.79	0.543	✓
Belt ⌀	n/a
Rim thickness	1.27	0.050	✓
Neck length	15.84	0.624	≈
Case length	73.02	2.875	✓
Overall length	89.66	3.530	✓

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. .404 Jeffery is highlighted below.

Factory loads

In production — 51 active loads across 12 brands. Top 15 shown · see all 52 →.

Brand	Load	Grain	Bullet	FPS	ft·lb	BC
HSM	HSM Trophy Gold	300	Monolithic Solid	2,600	4,502	—
Nosler	Safari	300	Solid	2,600	4,502	—
Hornady	Dangerous Game	300	DGX Bonded	2,600	4,502	—
Norma	African PH	300	Bonded Soft Point	2,600	4,502	—
Kynoch	Big Game / Nitro Express	300	Metal Covered Soft Nose	2,600	4,502	—
Cutting Edge Bullets	Safari	350	Raptor HP	2,500	4,856	—
Hornady	DGS FMJ Solid 400gr	400	DGS FMJ	2,360	4,946	—
Federal	Trophy Bonded Bear Claw 400gr	400	TBBC	2,360	4,946	—
Federal	Woodleigh Weldcore 400gr	400	Weldcore	2,360	4,946	—
Hornady	DGX Bonded 400gr	400	DGX Bonded	2,360	4,946	—
Woodleigh	Weldcore SP 400gr	400	Weldcore SP	2,360	4,946	—
Federal	Cape-Shok Trophy Bonded	400	Trophy Bonded	2,360	4,946	—
Barnes	TSX FB 400gr	400	TSX FB	2,360	4,946	—
Sellier & Bellot	SP 400gr	400	SP	2,360	4,946	—
Northfork	Cup-Bonded SP 400gr	400	Cup-Bonded SP	2,360	4,946	—

Velocities are manufacturer-stated (test-barrel). Discontinued loads dimmed.

Suitable powders

2 reloading powders listed for .404 Jeffery, fastest to slowest. Cross-reference in the finder →

N170 Reloader 25

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 $/lbCharge (gr)Bullet $/eaPrimer $/eaBrass reusesBrass $/ea

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

Firearms chambered in .404 Jeffery

12 models in the database chamber .404 Jeffery. Browse all →

Sauer 404 Synchro XTC .300 Win Mag 24-inchSauer 101 Classic .375 H&H Mag 24-inchRigby Highland Stalker .375 H&H MagChapuis Armes ROLS AfriqueRuger Ruger No. 1 .404 Jeffery 26-inchCooper Firearms Model 56 African .375 H&H Magnum 24-inchHeym SR 30 .300 Win Mag 24-inchDakota Arms Dakota 76 .404 Jeffery 25-inchDakota Arms African .375 H&H 24-inchHeym Express by Heym .404 Jeffery 24-inchDakota Arms Model 76 African .375 H&H Mag 23-inchRuger Ruger No. 1 .375 H&H 26-inch

Lineage

Immediate parent

Root — no documented parent

Direct descendants (13 · 18 total)

.300 WSM .300 Remington Ultra Magnum .300 Dakota .416 Dakota .270 WSM 8.5x55mm Blaser 7mm WSM .26 Nosler .375 Remington Ultra Magnum .27 Nosler .330 Dakota 7mm Remington Ultra Magnum .375 Dakota .333 Jeffery 7mm Dakota

Family TreeOpen .404 Jeffery in the interactive cartridge family tree↗

Connected reference

Loads52 factory loads for .404 Jeffery↗Reloading2 suitable powders — cross-reference↗FirearmsFirearms in .404 Jeffery↗ToolCompare ballistics↗

History

Introduced by W.J. Jeffery in 1905 for magazine rifles rather than double rifles. The rimless design fed reliably in bolt-action Mausers. Professional hunters in Africa adopted it widely. Its case dimensions influenced cartridge designers for a century — the .375 H&H, .416 Rigby, and numerous other cartridges all borrowed from the .404 Jeffery's case family.

FAQs

What twist rate does .404 Jeffery use?: .404 Jeffery typically uses a 1:16 twist rate.
What bullet diameter is .404 Jeffery?: .404 Jeffery uses a 0.422″ (10.72 mm) diameter bullet.
Is .404 Jeffery still in production?: .404 Jeffery is active; typical availability is common.
What is .404 Jeffery used for?: .404 Jeffery is primarily used for dangerous game, big game.
What are the best powders for .404 Jeffery?: Reloading powders commonly listed for .404 Jeffery include N170, Reloader 25.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 51 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →