Rifle · SAAMI
6.8mm 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
- 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
- Case capacity
- 36 gr H₂O
- Twist (typical)
- 1:10
- Primer
- Small Rifle
- Case type
- Rimless
- Max pressure
- 55,000 psi, SAAMI transducer
- Eff. range
- 500 yd
- Max range
- 4450 yd
- Recoil
- 9–13 ft·lb
Ballistics
Published velocity/energy data isn't available for 6.8mm Remington SPC. Parent case: .30 Remington.
Performance
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| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 7.04 | 0.277 | ✓ |
| Neck ⌀ | 7.77 | 0.306 | ✓ |
| Shoulder ⌀ | 10.21 | 0.402 | ✓ |
| Shoulder angle | 23° | — | ✓ |
| Base ⌀ | 10.72 | 0.422 | ✓ |
| Rim ⌀ | 10.72 | 0.422 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.25 | 0.049 | ✓ |
| Neck length | 6.93 | 0.273 | ≈ |
| Case length | 42.84 | 1.687 | ✓ |
| Overall length | 57.40 | 2.260 | ✓ |
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
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 →
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
Lineage
Connected reference
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 1:10 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
- Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
- Standard C.I.P. — C.I.P. TDCC — Tables of Dimensions of Cartridges and Chambers
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 72 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
