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Lindcott Armory

Rifle · CIP

.375 H&H Magnum

Also known as .375 Holland & Holland · .375 H&H

The most famous dangerous game cartridge in the world.

Caliber
0.375″ · 9.525 mm
Introduced
1912
Case
Belted
Primary use
Hunting
Status
Active

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Velocity2,400–2,700 fps
Energy4,000–4,900 ft·lb
Typical grains260 · 270 · 300 gr
Identity
Introduced
1912
Type
Rifle
Origin
United Kingdom
Inventor
Holland & Holland
Manufacturer
Holland & Holland
Standard
CIP
Status
Active
Availability
Abundant
Build
Case capacity
95 gr H₂O
Twist (typical)
1:12
Primer
Large Rifle Magnum
Case type
Belted
Pressure & range
Max pressure
62,000 psi
Eff. range
400 yd
Max range
4000 yd
Recoil
40–55 ft·lb

Introduced by Holland & Holland

Ballistics

Representative trajectory · velocity only, no drag model · 100 yd zero0–800 yd
-140" -120" -100" -80" -60" -40" -20" 0" Line of sight 0 yd 100 yd 200 yd 300 yd 400 yd 500 yd 600 yd 700 yd 800 yd 100 yd zero 133″ drop @ 800 yd
Drop Zero

Velocity only, no drag model: no published ballistic coefficient is on file for .375 H&H Magnum, so this is the shape gravity alone gives the advertised velocity. Drag would steepen it. The tool below solves real loads through their published G1 or G7 model.

Open in Ballistic Compare
Parent case
—

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

Performance

Best for Hunting Hornady Dangerous Game 300 gr · DGX · 2,530 fps
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
Measuremmin✓
Bullet ⌀ 9.530.375 ✓
Neck ⌀ 10.210.402 ✓
Shoulder ⌀ 11.370.448 ✓
Shoulder angle 15°— ✓
Base ⌀ 13.030.513 ✓
Rim ⌀ 13.510.532 ✓
Belt ⌀ 13.560.534 ✓
Rim thickness 1.270.050 ✓
Neck length 8.940.352 ≈
Case length 72.392.850 ✓
Overall length 91.443.600 ✓

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. .375 H&H Magnum is highlighted below.

Factory loads

In production — 157 active loads across 23 brands. Top 2 shown · see all 162 →.

BrandLoadGrainBulletFPSft·lbBC
HornadyDangerous Game 300DGX 2,5304,263 —
HornadyDangerous Game 300DGS 2,5304,263 —

Velocities are manufacturer-stated (test-barrel). Discontinued loads are shaded and marked.

Suitable powders

20 reloading powders listed for .375 H&H Magnum, fastest to slowest. Cross-reference in the finder →

Norma 201Norma 200N135N550203-BNorma 202N555Vihtavuori N140N540Vihtavuori N150Norma MRPMRP2Tubal 7000S365N165N170IMR 5010LRTIMR 8133N105
Reloading costestimate cost per round vs factory

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

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

Firearms chambered in .375 H&H Magnum

12 models in the database chamber .375 H&H Magnum. Browse all →

CZ-USA 600 Lux .375 H&H MagCZ-USA CZ 600 Safari .375 H&H Mag 23.6-inchSako 90 Adventure .300 Win Mag 24-inchRuger Explore .416 Rigby 23-inchSAKO 90 Adventure .300 Win MagJohn Rigby & Co Saddle Gun 375 H&HChristensen Arms Mesa 338 Win MagSauer & Sohn 404 Synchro XT .308 WinSako 90 Adventure .375 H&H MagWeatherby Mark V Outfitter 375 H&HSavage Arms 110 BEAR Hunter .375 H&H 23-inchSauer & Sohn 404 Synchro XT .30-06 Sprg

Lineage

Immediate parent
Root — no documented parent
Direct descendants (16 · 31 total)
.416 Hoffman.300 Winchester Magnum7mm Remington Magnum.300 H&H Magnum.257 Weatherby Magnum.338 Winchester Magnum.340 Weatherby Magnum.350 Remington Magnum8mm Remington Magnum.458 Winchester Magnum.416 Remington Magnum.376 Steyr.264 Winchester Magnum.375 Weatherby Magnum.458 Lott
Family TreeOpen .375 H&H Magnum in the interactive cartridge family tree

Connected reference

Loads162 factory loads for .375 H&H MagnumReloading20 suitable powders — cross-referenceFirearmsFirearms in .375 H&H MagnumToolCompare ballistics

History

Introduced by London gunmaker Holland & Holland in 1912. Quickly became the standard dangerous game cartridge. Used by virtually every famous African hunter. Its belted case design became the template for most magnum cartridges. Required by law in many African jurisdictions for hunting dangerous game. Over 100 years later, still the gold standard.

FAQs

What twist rate does .375 H&H Magnum use?
.375 H&H Magnum typically uses a 1:12 twist rate.
What bullet diameter is .375 H&H Magnum?
.375 H&H Magnum uses a 0.375″ (9.525 mm) diameter bullet.
Is .375 H&H Magnum still in production?
.375 H&H Magnum is active; typical availability is abundant.
What is .375 H&H Magnum used for?
.375 H&H Magnum is primarily used for hunting.
What are the best powders for .375 H&H Magnum?
Reloading powders commonly listed for .375 H&H Magnum include Norma 201, Norma 200, N135, N550, among 20 suitable options.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 157 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →