Rifle · Not SAAMI standardized · Not standardizedObsolete
6.5x58mm Portuguese
Portugal's military rifle cartridge from 1904, chambered in Mauser-action rifles.
- Caliber
- 0.264″ · 6.706 mm
- Introduced
- 1904
- Case
- Rimless
- Parent
- 6.5x54mm Mauser
- Primary use
- Hunting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1904
- Type
- Rifle
- Origin
- Portugal
- Inventor
- Portuguese military
- Manufacturer
- Portuguese Military
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Collector
- Case capacity
- 62 gr H₂O
- Twist (typical)
- 1:9
- Primer
- Boxer Small Rifle
- Case type
- Rimless
- Max pressure
- 51,488 psi, CIP transducer
- Eff. range
- 400 yd
- Max range
- 5350 yd
- Recoil
- 10–15 ft·lb
Ballistics
Published velocity/energy data isn't available for 6.5x58mm Portuguese — an obsolete/collector cartridge. Parent case: 6.5x54mm Mauser.
Performance
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
Wikipedia · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 6.71 | 0.264 | ~ |
| Neck ⌀ | 7.70 | 0.303 | · |
| Shoulder ⌀ | 10.95 | 0.431 | · |
| Shoulder angle | 23° | — | |
| Base ⌀ | 11.89 | 0.468 | · |
| Rim ⌀ | 11.81 | 0.465 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.50 | 0.059 | · |
| Neck length | 6.86 | 0.270 | |
| Case length | 57.91 | 2.280 | · |
| Overall length | 82.50 | 3.248 | · |
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. 6.5x58mm Portuguese is highlighted below.
Missing a dimension for 6.5x58mm Portuguese? Some case measurements aren't in a published SAAMI/CIP drawing yet. Have a factory or reamer print? Send it → — verified hard-to-find data earns a free Lindcott sticker.
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 6.5x58mm Portuguese
Lineage
History
Developed in 1904 for Portugal's adoption of the Mauser bolt-action rifle to replace the Kropatschek. The 6.5x58mm Portuguese used a relatively modern small-caliber design with good long-range ballistics. Chambered in Portuguese Mausers used in colonial Africa and during WWI in alliance with Britain.
FAQs
- What twist rate does 6.5x58mm Portuguese use?
- 6.5x58mm Portuguese typically uses a 1:9 twist rate.
- What bullet diameter is 6.5x58mm Portuguese?
- 6.5x58mm Portuguese uses a 0.264″ (6.706 mm) diameter bullet.
- Is 6.5x58mm Portuguese still in production?
- 6.5x58mm Portuguese is discontinued; typical availability is collector.
- What is 6.5x58mm Portuguese used for?
- 6.5x58mm Portuguese is primarily used for hunting.
- What is 6.5x58mm Portuguese based on?
- 6.5x58mm Portuguese is derived from the 6.5x54mm Mauser case.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 12 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
