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Rifle · SAAMI

.300 Norma Magnum

.300 NM.300 Norma

Adopted by SOCOM for the Advanced Sniper Rifle.

Caliber
0.3083″ · 7.83 mm
Introduced
2012
Case
Rimless
Parent
.338 Norma Magnum
Primary use
Long Range, Military, Competition
Status
Active
Velocity2,800–3,100 fps
Energy3,750–4,900 ft·lb
Typical grains215 · 225 · 230 gr
Identity
Introduced
2012
Type
Rifle
Origin
Sweden
Inventor
Norma
Manufacturer
Norma
Standard
SAAMI
Status
Active
Availability
Common
Build
Case capacity
99 gr H₂O
Twist (typical)
1:9
Primer
Large Rifle Magnum
Case type
Rimless
Pressure & range
Max pressure
61,000 psi
Eff. range
1500 yd
Max range
2500 yd
Recoil
28–40 ft·lb

Ballistics

Real trajectory computed from a representative load — Hornady Match ELD-M 230 gr, 2,950 fps, BC 0.416 G7 · 100 yd zero.

overlay up to 2
RangeVelocityEnergyDrop (in)Drop (MOA)
0 yd29494442-1.5″—
100 yd283741100.0″0.0
200 yd27273797-2.9″-1.4
300 yd26193503-10.4″-3.3
400 yd25133225-23.0″-5.5
500 yd24092964-41.1″-7.8
600 yd23082721-65.1″-10.4
700 yd22092492-95.8″-13.1
800 yd21132279-133.5″-15.9

Point-mass G7/G1 drag model, standard atmosphere — within ~2% of reference solvers to 1000 yd; real barrels and conditions vary. Open in Ballistic Compare →

Performance

Best for HuntingHornady Precision Hunter ELD-X225 gr · ELD-X · 2,975 fps · BC 0.368 G7Buy now →
Best for TargetHornady Match ELD-M230 gr · ELD-M · 2,950 fps · BC 0.416 G7Buy now →

Buy links open .300 Norma 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.

CIP TDCC · verified
Measuremmin✓
Bullet ⌀7.830.308✓
Neck ⌀8.680.342✓
Shoulder ⌀14.290.563✓
Shoulder angle20.5°—✓
Base ⌀14.870.585✓
Rim ⌀14.930.588✓
Belt ⌀n/a
Rim thickness1.520.060✓
Neck length7.780.306≈
Case length63.302.492✓
Overall length93.503.681✓

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. .300 Norma Magnum is highlighted below.

Factory loads

In production — 44 active loads across 15 brands. Top 15 shown · see all 44 →.

BrandLoadGrainBulletFPSft·lbBC
HornadyMatch ELD-M195ELD-M3,2004,4330.318 G7
HornadyPrecision Hunter ELD-X 210gr210ELD-X3,0504,3370.347 G7
NoslerRDF HPBT 230gr230RDF HPBT3,0184,6510.689 G1
NormaDiamond Line Match OTM 230gr230Diamond OTM3,0184,6510.352 G7
FederalGold Medal Berger Hybrid 215gr215Berger Hybrid OTM3,0184,3480.354 G7
HornadyELD-M Match 225gr225ELD-M3,0184,5500.391 G7
RUAG AmmotecSwiss P Target HPBT 220gr220HPBT3,0184,4490.629 G1
BergerHybrid OTM Tactical 230gr230Hybrid OTM3,0184,6510.352 G7
NAMMORaufoss MP Match 220gr220OTM3,0004,3960.620 G1
NoslerTrophy Grade AccuBond LR210AccuBond LR3,0004,1960.350 G7
HornadyPrecision Hunter ELD-X225ELD-X2,9754,4210.368 G7
HornadyPrecision Hunter225ELD-X2,9754,4210.368 G7
HornadyELD-X212ELD-X2,9534,1040.350 G7
BergerElite Hunter215OTM2,9534,1620.354 G7
HornadyMatch ELD-M230ELD-M2,9504,4440.416 G7

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

Suitable powders

6 reloading powders listed for .300 Norma Magnum, fastest to slowest. Cross-reference in the finder →

AR 2217N170Reloader 25Reloader 26IMR 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 .300 Norma Magnum

10 models in the database chamber .300 Norma Magnum. Browse all →

Barrett MRAD 6.5 PRCChristensen Arms ELR 338 LapuaFierce Firearms Twisted Rival .300 Norma Mag 26-inchBergara Premier HMR Pro .300 PRC 26-inchLone Peak Arms Fuzion .300 PRC 26-inchBergara B-14 HMR .300 Norma Mag 26-inchChristensen Arms MPR .300 Norma Mag 26-inchGA Precision Templar 338 LapuaCadex Defence CDX-33 338 LapuaBlaser R8 .300 Norma Mag 25.75-inch

Lineage

Immediate parent
.338 Norma Magnum · necked down from

ⓘ Direct parent is .338 Norma Magnum (necked down to .308); .338 Lapua is a sibling. Both trace to grandparent .416 Rigby.

Family TreeOpen .300 Norma Magnum in the interactive cartridge family tree↗

Connected reference

Loads44 factory loads for .300 Norma Magnum↗Reloading6 suitable powders — cross-reference↗FirearmsFirearms in .300 Norma Magnum↗ToolCompare ballistics↗

History

Introduced by Norma in 2012. Selected by U.S. SOCOM for the Mk 22 Advanced Sniper Rifle System in 2019, alongside .300 PRC and .338 Norma Magnum. Provides extreme long-range capability with manageable recoil compared to .338 Lapua.

FAQs

What twist rate does .300 Norma Magnum use?
.300 Norma Magnum typically uses a 1:9 twist rate.
What bullet diameter is .300 Norma Magnum?
.300 Norma Magnum uses a 0.3083″ (7.83 mm) diameter bullet.
Is .300 Norma Magnum still in production?
.300 Norma Magnum is active; typical availability is common.
What is .300 Norma Magnum used for?
.300 Norma Magnum is primarily used for long range, military, competition.
What is .300 Norma Magnum based on?
.300 Norma Magnum is derived from the .338 Lapua Magnum case.
What are the best powders for .300 Norma Magnum?
Reloading powders commonly listed for .300 Norma Magnum include AR 2217, N170, Reloader 25, Reloader 26, among 6 suitable options.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 44 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →