Lindcott Armory Rifle · SAAMI
.300 AAC Blackout
AR-15 compatible .30-caliber cartridge optimized for short barrels and suppressor use.
- Caliber
- 0.3079″ · 7.82 mm
- Introduced
- 2011
- Case
- Rimless
- Parent
- .221 Remington Fireball
- Primary use
- Military, Hunting, Self Defense
- Status
- Active
- Introduced
- 2011
- Type
- Rifle
- Origin
- United States
- Inventor
- Advanced Armament Corporation
- Manufacturer
- AAC / Remington
- Standard
- SAAMI
- Status
- Active
- Availability
- Common
- Case capacity
- 26.5 gr H₂O
- Twist (typical)
- 1:7
- Primer
- Small Rifle
- Case type
- Rimless
- Max pressure
- 55,000 psi
- Eff. range
- 500 yd
- Recoil
- 7–10 ft·lb
- Subsonic
- Capable
Ballistics
- By real loads
- 1,000–2,375 fps · 170 loads
- Parent case
- .221 Remington Fireball
Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).
Performance
Buy links open .300 AAC Blackout 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 · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 7.82 | 0.308 | ✓ |
| Neck ⌀ | 8.48 | 0.334 | ✓ |
| Shoulder ⌀ | 9.16 | 0.361 | ~ |
| Shoulder angle | 17.5° | — | ✓ |
| Base ⌀ | 9.55 | 0.376 | ✓ |
| Rim ⌀ | 9.60 | 0.378 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.14 | 0.045 | ✓ |
| Neck length | 6.75 | 0.266 | ≈ |
| Case length | 34.75 | 1.368 | ✓ |
| 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. .300 AAC Blackout is highlighted below.
Factory loads
In production — 170 active loads across 47 brands. Top 15 shown · see all 170 →.
| Brand | Load | Grain | Bullet | FPS | ft·lb | BC |
|---|---|---|---|---|---|---|
| Liberty Defense | Ultra Defense | 78 | HP | 2,800 | 1,358 | — |
| Corbon | Glaser | 78 | Safety Slug | 2,800 | 1,358 | — |
| Liberty Defense | Civil Defense | 78 | HP | 2,800 | 1,358 | — |
| Federal | American Eagle | 115 | OTM | 2,800 | 2,002 | — |
| Liberty Defense | CIVIL DEFENSE | 78 | Monolithic HP | 2,600 | 1,171 | — |
| Sinterfire | Green Elite | 100 | Frangible | 2,500 | 1,388 | — |
| Underwood Ammo | Xtreme Penetrator | 110 | XP | 2,400 | 1,407 | — |
| DoubleTap | Hunting | 110 | Barnes TTSX | 2,400 | 1,407 | — |
| Remington | Hog Hammer | 130 | TSX | 2,375 | 1,628 | — |
| Hornady | Zombie Max | 110 | Z-MAX HP | 2,375 | 1,377 | — |
| Hornady | GMX | 110 | GMX | 2,375 | 1,377 | — |
| Hornady | Black | 110 | V-MAX | 2,375 | 1,377 | — |
| DoubleTap | Bonded Defense | 110 | HP | 2,375 | 1,377 | — |
| Hornady | Varmint Express | 110 | V-Max | 2,375 | 1,377 | — |
| Gorilla Ammunition | Supersonic | 110 | Poly-coated HP | 2,350 | 1,349 | — |
Velocities are manufacturer-stated (test-barrel). Discontinued loads dimmed.
Suitable powders
12 reloading powders listed for .300 AAC Blackout, 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 .300 AAC Blackout
12 models in the database chamber .300 AAC Blackout. Browse all →
Lineage
Connected reference
History
Created in 2011 by Advanced Armament Corp for special operations. Goal was .30-caliber performance in AR-15 magazines with excellent suppressed performance. Uses same bolt as 5.56 NATO.
FAQs
- What twist rate does .300 AAC Blackout use?
- .300 AAC Blackout typically uses a 1:7 twist rate.
- What bullet diameter is .300 AAC Blackout?
- .300 AAC Blackout uses a 0.3079″ (7.82 mm) diameter bullet.
- Is .300 AAC Blackout still in production?
- .300 AAC Blackout is active; typical availability is common.
- What is .300 AAC Blackout used for?
- .300 AAC Blackout is primarily used for military, hunting, self defense.
- What is .300 AAC Blackout based on?
- .300 AAC Blackout is derived from the .221 Remington Fireball case.
- What are the best powders for .300 AAC Blackout?
- Reloading powders commonly listed for .300 AAC Blackout include Accurate 1680, H110, Lil'Gun, IMR 4227, among 12 suitable options.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 170 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →