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Lindcott Armory

Rifle · SAAMI

6.8mm Remington SPC

Also known as 6.8 SPC · 6.8x43mm · 6.8 Remington SPC

Special Forces-designed AR-15 cartridge offering dramatically better terminal performance than 5.56mm in short barrels..

Caliber
0.277″ · 7.036 mm
Introduced
2004
Case
Rimless
Parent
.30 Remington
Primary use
Military, Hunting, Self-Defense
Status
Active

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VelocityBeing verified
EnergyBeing verified
Typical grains85 · 110 · 115 gr
Identity
Introduced
2004
Type
Rifle
Origin
United States
Inventor
U.S. Army Special Forces / Remington
Manufacturer
Remington / U.S. Special Forces
Standard
SAAMI
Status
Active
Availability
Common
Build
Case capacity
36 gr H₂O
Twist (typical)
1:11 to 1:12
Primer
Small Rifle
Case type
Rimless
Pressure & range
Max pressure
55,000 psi
Eff. range
500 yd
Max range
1000 yd
Recoil
9–13 ft·lb

Ballistics

Published velocity/energy data isn't available for 6.8mm Remington SPC. Parent case: .30 Remington.

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 ⌀ 7.040.277 ✓
Neck ⌀ 7.770.306 ✓
Shoulder ⌀ 10.210.402 ✓
Shoulder angle 23°— ✓
Base ⌀ 10.720.422 ✓
Rim ⌀ 10.720.422 ✓
Belt ⌀ n/a
Rim thickness 1.250.049 ✓
Neck length 6.930.273 ≈
Case length 42.841.687 ✓
Overall length 57.402.260 ✓

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. 6.8mm Remington SPC is highlighted below.

Factory loads

Verification

Being verified

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

Suitable powders

4 reloading powders listed for 6.8mm Remington SPC, fastest to slowest. Cross-reference in the finder →

H322H3352015IMR 3031
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 6.8mm Remington SPC

12 models in the database chamber 6.8mm Remington SPC. Browse all →

Aero Precision M4E1 Enhanced 6.8 SPC 16-inchLWRC International Six8-A5 6.8 SPC 16-inchSpringfield Armory SAINT Victor 6.8 SPC 16-inchSpringfield Armory SAINT AR-15 6.8 SPC 16-inchAero Precision M4E1 6.8 SPC 16-inchRuger Ruger American Rifle Ranch 6.8 SPCLWRC International SIX8-A5 6.8 SPC 12.7-inchRuger AR-556 6.8 SPC 18-inchLWRC International LWRC IC-A5 Pistol 6.8 SPCLWRC International SIX8-PDW 6.8 SPC 8.5-inchLWRC International LWRC IC-SPR 6.8 SPCLWRCI SIX8-A5 6.8 SPC 14.7-inch

Lineage

Immediate parent
.30 Remington
Direct descendants (2)
.224 Valkyrie.22 Nosler
Family TreeOpen 6.8mm Remington SPC in the interactive cartridge family tree

Connected reference

Loads73 factory loads for 6.8mm Remington SPCReloading4 suitable powders — cross-referenceFirearmsFirearms in 6.8mm Remington SPC

History

Developed by U.S. Army Special Forces and Remington after perceived terminal performance issues with 5.56mm in short-barreled M4s. Uses the same bolt as 5.56mm but a larger case and heavier bullet. Never adopted as a standard military cartridge.

FAQs

What twist rate does 6.8mm Remington SPC use?
6.8mm Remington SPC typically uses a 1:11 to 1:12 twist rate.
What bullet diameter is 6.8mm Remington SPC?
6.8mm Remington SPC uses a 0.277″ (7.036 mm) diameter bullet.
Is 6.8mm Remington SPC still in production?
6.8mm Remington SPC is active; typical availability is common.
What is 6.8mm Remington SPC used for?
6.8mm Remington SPC is primarily used for military, hunting, self-defense.
What is 6.8mm Remington SPC based on?
6.8mm Remington SPC is derived from the .30 Remington case.
What are the best powders for 6.8mm Remington SPC?
Reloading powders commonly listed for 6.8mm Remington SPC include H322, H335, 2015, IMR 3031.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 73 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →