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Lindcott Armory

Rifle · SAAMI

6mm BR Norma

Also known as 6mm BR · 6 BR

The benchmark of precision rifle cartridges.

Caliber
0.2429″ · 6.17 mm
Introduced
1978
Case
Rimless
Parent
.308 Winchester
Primary use
Competition, Long Range
Status
Active

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VelocityBeing verified
EnergyBeing verified
Typical grains100 · 105 · 107 gr
Identity
Introduced
1978
Type
Rifle
Origin
Sweden
Inventor
Norma / Bench Rest community
Manufacturer
Norma / Lapua
Standard
SAAMI
Status
Active
Availability
Common
Build
Case capacity
37.5 gr H₂O
Twist (typical)
1:8
Primer
Small Rifle
Case type
Rimless
Pressure & range
Max pressure
60,000 psi
Eff. range
800 yd
Max range
1400 yd
Recoil
5–8 ft·lb

Ballistics

Published velocity/energy data isn't available for 6mm BR Norma. Parent case: .308 Winchester.

Performance

Best for Withheld until verified
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.

CIP TDCC · verified
Measuremmin✓
Bullet ⌀ 6.170.243 ✓
Neck ⌀ 6.870.270 ✓
Shoulder ⌀ 11.680.460 ✓
Shoulder angle 30°— ✓
Base ⌀ 11.960.471 ✓
Rim ⌀ 12.010.473 ✓
Belt ⌀ n/a
Rim thickness 1.370.054 ✓
Neck length 8.180.322 ≈
Case length 39.621.560 ✓
Overall length 62.002.441 ✓

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. 6mm BR Norma is highlighted below.

Factory loads

Verification

Being verified

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

Suitable powders

12 reloading powders listed for 6mm BR Norma, fastest to slowest. Cross-reference in the finder →

IMR 8208 XBRNorma 201H322Vihtavuori N133IMR 3031N135203-BNorma 202Vihtavuori N140LT-32N540Vihtavuori N150
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 6mm BR Norma

10 models in the database chamber 6mm BR Norma. Browse all →

GA Precision Templar V2Kelbly's Atlas TacticalNightforce BR .308 Win 26-inchSurgeon Rifles Surgeon 591 .308 Win 26-inchLapua Lapua Scenar 6 BR Norma 30-inchSavage Arms 12 BenchrestKelbly's PandaPacific Tool & Gauge PTG Bat Action 6 PPC 28-inchStolle Panda Panda 6mm BRShilen Shilen DGA .308 Win 26-inch

Lineage

Immediate parent
.308 Winchester
Direct descendants (6 · 7 total)
6.5mm BRX.30 BR.22 BR6 BRA6mm Dasher6mm BRX
Family TreeOpen 6mm BR Norma in the interactive cartridge family tree

Connected reference

Loads19 factory loads for 6mm BR NormaReloading12 suitable powders — cross-referenceFirearmsFirearms in 6mm BR Norma

History

Developed from the .308/7.62x51mm case necked down, then refined by Norma. The bench rest community adopted it and found it extraordinarily accurate. Parents the 6mm Dasher and influenced 6.5 Creedmoor development.

FAQs

What twist rate does 6mm BR Norma use?
6mm BR Norma typically uses a 1:8 twist rate.
What bullet diameter is 6mm BR Norma?
6mm BR Norma uses a 0.2429″ (6.17 mm) diameter bullet.
Is 6mm BR Norma still in production?
6mm BR Norma is active; typical availability is common.
What is 6mm BR Norma used for?
6mm BR Norma is primarily used for competition, long range.
What is 6mm BR Norma based on?
6mm BR Norma is derived from the .308 Winchester case.
What are the best powders for 6mm BR Norma?
Reloading powders commonly listed for 6mm BR Norma include IMR 8208 XBR, Norma 201, H322, Vihtavuori N133, among 12 suitable options.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 19 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →