Rifle · Military · Not SAAMI standardized · Not standardizedObsolete
8x60mmR Guedes
Single-shot military rifle cartridge developed for the Portuguese Guedes rifle; a transitional arm between single-shot black powder and repeating small-bore military rifles..
- Caliber
- 0.326″ · 8.28 mm
- Introduced
- 1885
- Case
- Rimmed
- Primary use
- Hunting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1885
- Type
- Rifle
- Origin
- Portugal
- Inventor
- Portuguese military
- Manufacturer
- Portugal state arsenals
- Standard
- Military · Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Rare
- Case capacity
- 70.5 gr H₂O
- Twist (typical)
- 1:10
- Primer
- Berdan Large Rifle
- Case type
- Rimmed
- Max pressure
- 49,313 psi, CIP transducer
- Eff. range
- 250 yd
- Max range
- 4650 yd
- Recoil
- 19.7–20.5 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 8x60mmR Guedes, so this is the shape gravity alone gives the advertised velocity. Drag would steepen it. The tool below solves real loads through their published G1 or G7 model.
Open in Ballistic Compare- Parent case
- —
Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).
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 ⌀ | 8.28 | 0.326 | · |
| Neck ⌀ | 8.97 | 0.353 | · |
| Shoulder ⌀ | 12.21 | 0.481 | ~ |
| Shoulder angle | 12.7° | — | ~ |
| Base ⌀ | 13.77 | 0.542 | · |
| Rim ⌀ | 15.80 | 0.622 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.65 | 0.065 | ~ |
| Neck length | 14.22 | 0.560 | ≈ |
| Case length | 59.69 | 2.350 | ~ |
| Overall length | 82.04 | 3.230 | ~ |
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. 8x60mmR Guedes is highlighted below.
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.
Connected reference
History
Developed for the Guedes Model 1885 single-shot falling-block rifle, Portugal's last major black powder single-shot military arm. Replaced shortly after by the 8x60mmR Kropatschek tubular magazine rifle, making the Guedes cartridge one of the shortest-lived major military cartridges.
FAQs
- What twist rate does 8x60mmR Guedes use?
- 8x60mmR Guedes typically uses a 1:10 twist rate.
- What bullet diameter is 8x60mmR Guedes?
- 8x60mmR Guedes uses a 0.326″ (8.28 mm) diameter bullet.
- Is 8x60mmR Guedes still in production?
- 8x60mmR Guedes is discontinued; typical availability is rare.
- What is 8x60mmR Guedes used for?
- 8x60mmR Guedes is primarily used for hunting.
Sources & provenance
- Secondary Wikipedia — Guedes Rifle · grain weights, velocity, year archived
- Secondary International Ammunition Association Forum — Designs — 8x60R M1885 Guedes / 8x60R M1886 Kropatschek · bullet ⌀ archived
- Secondary CartridgeCollector.net — 8 x 60R Guedes · grain weights, bullet ⌀ archived
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
