Rifle · SAAMI
.300 Remington Short Action Ultra Magnum
Remington's short-action ultra magnum cartridge, designed to match .300 Win Mag performance in a shorter action.
- Caliber
- 0.308″ · 7.823 mm
- Introduced
- 2001
- Case
- Rebated
- Parent
- .300 Remington Ultra Magnum
- Primary use
- Hunting
- Status
- Discontinued
- Introduced
- 2001
- Type
- Rifle
- Origin
- United States
- Inventor
- Remington
- Manufacturer
- Remington Arms
- Standard
- SAAMI
- Status
- Discontinued
- Availability
- Collector
- Case capacity
- 78 gr H₂O
- Twist (typical)
- 1:10
- Primer
- Boxer Large Rifle
- Case type
- Rebated
- Max pressure
- 65,000 psi, SAAMI transducer
- Eff. range
- 600 yd
- Max range
- 4900 yd
- Recoil
- 25–35 ft·lb
Introduced by Remington Arms
Ballistics
Published velocity/energy data isn't available for .300 Remington Short Action Ultra Magnum — an obsolete/collector cartridge. Parent case: .300 Remington Ultra Magnum.
Performance
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
SAAMI · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 7.82 | 0.308 | ✓ |
| Neck ⌀ | 8.74 | 0.344 | ✓ |
| Shoulder ⌀ | 13.58 | 0.535 | ✓ |
| Shoulder angle | 30° | — | ✓ |
| Base ⌀ | 13.97 | 0.550 | ✓ |
| Rim ⌀ | 13.56 | 0.534 | ✓ |
| Belt ⌀ | — | — | |
| Rim thickness | 1.27 | 0.050 | ~ |
| Neck length | 7.91 | 0.311 | ≈ |
| Case length | 51.18 | 2.015 | ✓ |
| Overall length | 71.76 | 2.825 | ✓ |
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 Remington Short Action Ultra Magnum is highlighted below.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
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 Remington Short Action Ultra Magnum
Lineage
shortened to short-action length
History
Introduced by Remington in 2002 as a short-action alternative to the .300 Winchester Magnum. Used a rebated rim on a fat, short case. Failed commercially due to feeding issues, limited rifle availability, and the simultaneous success of .300 WSM. Officially discontinued around 2012.
FAQs
- What twist rate does .300 Remington Short Action Ultra Magnum use?
- .300 Remington Short Action Ultra Magnum typically uses a 1:10 twist rate.
- What bullet diameter is .300 Remington Short Action Ultra Magnum?
- .300 Remington Short Action Ultra Magnum uses a 0.308″ (7.823 mm) diameter bullet.
- Is .300 Remington Short Action Ultra Magnum still in production?
- .300 Remington Short Action Ultra Magnum is discontinued; typical availability is collector.
- What is .300 Remington Short Action Ultra Magnum used for?
- .300 Remington Short Action Ultra Magnum is primarily used for hunting.
- What is .300 Remington Short Action Ultra Magnum based on?
- .300 Remington Short Action Ultra Magnum is derived from the .300 Remington Ultra Magnum case.
Sources & provenance
- Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
- Standard SAAMI — SAAMI cartridge & chamber drawing — .300 Remington Short Action Ultra Magnum
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 20 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
