What twist rate does 8mm Remington Magnum use?

8mm Remington Magnum typically uses a 1:10 twist rate.

What bullet diameter is 8mm Remington Magnum?

8mm Remington Magnum uses a 0.323″ (8.204 mm) diameter bullet.

Is 8mm Remington Magnum still in production?

8mm Remington Magnum is active; typical availability is limited.

What is 8mm Remington Magnum used for?

8mm Remington Magnum is primarily used for hunting.

What is 8mm Remington Magnum based on?

8mm Remington Magnum is derived from the .375 H&H Magnum case.

What are the best powders for 8mm Remington Magnum?

Reloading powders commonly listed for 8mm Remington Magnum include N170, Reloader 25.

Rifle · SAAMI

8mm Remington Magnum

8mm Rem Mag8x73mmRB

Powerful belted magnum pushing 8mm (.323") bullets at impressive velocity.

Caliber: 0.323″ · 8.204 mm
Introduced: 1978
Case: Belted
Parent: .375 H&H Magnum
Primary use: Hunting
Status: Active

Velocity2,800–3,110 fps

Energy3,220–4,712 ft·lb

Typical grains185 · 200 · 220 gr

Identity

Introduced: 1978
Type: Rifle
Origin: United States
Inventor: Remington
Manufacturer: Remington
Standard: SAAMI
Status: Active
Availability: Limited

Build

Case capacity: 106 gr H₂O
Twist (typical): 1:10
Primer: Large Rifle Magnum
Case type: Belted

Pressure & range

Max pressure: 65,000 psi
Eff. range: 400 yd
Max range: 900 yd
Recoil: 20–30 ft·lb

Ballistics

Representative trajectory · 100 yd zero0–800 yd

Open in Ballistic Compare ↗

By real loads: 2,830–3,180 fps · 15 loads
Parent case: .375 H&H Magnum

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

Performance

Best for HuntingBarnes TTSX165 gr · TSX-BT · 3,180 fpsBuy now →

Buy links open 8mm Remington Magnum 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.

SAAMI · verified

Measure	mm	in	✓
Bullet ⌀	8.20	0.323	✓
Neck ⌀	9.02	0.355	✓
Shoulder ⌀	12.37	0.487	✓
Shoulder angle	25°	—	✓
Base ⌀	13.02	0.513	✓
Rim ⌀	13.51	0.532	✓
Belt ⌀	13.51	0.532	✓
Rim thickness	1.27	0.050	✓
Neck length	8.12	0.320	≈
Case length	72.39	2.850	✓
Overall length	91.44	3.600	✓

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. 8mm Remington Magnum is highlighted below.

Factory loads

In production — 15 active loads across 8 brands. Top 15 shown.

Brand	Load	Grain	Bullet	FPS	ft·lb	BC
Barnes	TTSX	165	TSX-BT	3,180	3,704	—
Remington	Core-Lokt PSP	185	Core-Lokt PSP	3,080	3,896	—
Black Hills	Gold	185	AccuBond	3,080	3,896	—
Nosler	Partition	185	Partition	3,080	3,896	—
Hornady	InterLock	185	SP	3,080	3,896	—
Remington	Premier	185	AccuTip	3,080	3,896	—
Remington	Core-Lokt	185	SP	3,080	3,896	—
Federal	Premium	185	Trophy Bonded	3,080	3,896	—
Norma	Oryx	185	Oryx	3,080	3,896	—
Sellier & Bellot	SP Hunting	196	SP	2,953	3,794	—
Barnes	VOR-TX TTSX BT	200	TTSX BT	2,900	3,734	—
Remington	Premier Core-Lokt Ultra Bonded	200	Core-Lokt Ultra Bonded	2,900	3,734	—
Nosler	Trophy Grade Partition	200	Partition	2,900	3,734	—
Hornady	Custom Interlock SP	220	Interlock SP	2,830	3,912	—
Federal	Power-Shok SP	220	SP	2,830	3,912	—

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

Suitable powders

2 reloading powders listed for 8mm Remington Magnum, 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 8mm Remington Magnum

2 models in the database chamber 8mm Remington Magnum. Browse all →

Remington Arms 700 Classic 8mm Rem Mag 24-inchRemington Remington 700 Classic 8mm Rem Mag

Lineage

Immediate parent

.375 H&H Magnum

Direct descendants (1)

7mm STW

Family TreeOpen 8mm Remington Magnum in the interactive cartridge family tree↗

Connected reference

Loads15 factory loads for 8mm Remington Magnum↗Reloading2 suitable powders — cross-reference↗FirearmsFirearms in 8mm Remington Magnum↗ToolCompare ballistics↗

History

Introduced by Remington in 1978 for the Model 700 BDL. The cartridge offered 8mm performance exceeding European standards and was aimed at elk and moose hunters wanting more power than .30 caliber magnums. Limited factory ammunition selection has constrained popularity, but handloaders appreciate the combination of the large case and quality 8mm bullets from European manufacturers.

FAQs

What twist rate does 8mm Remington Magnum use?: 8mm Remington Magnum typically uses a 1:10 twist rate.
What bullet diameter is 8mm Remington Magnum?: 8mm Remington Magnum uses a 0.323″ (8.204 mm) diameter bullet.
Is 8mm Remington Magnum still in production?: 8mm Remington Magnum is active; typical availability is limited.
What is 8mm Remington Magnum used for?: 8mm Remington Magnum is primarily used for hunting.
What is 8mm Remington Magnum based on?: 8mm Remington Magnum is derived from the .375 H&H Magnum case.
What are the best powders for 8mm Remington Magnum?: Reloading powders commonly listed for 8mm Remington Magnum include N170, Reloader 25.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 15 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →