Rifle · Not SAAMI standardized · Not standardizedObsolete
.577/500 Nitro Express
.577/500 Nitro Express is a rimmed bottlenecked rifle cartridge of United Kingdom origin.
- Caliber
- 0.508″ · 12.903 mm
- Introduced
- 1898
- Case
- Rimmed
- Primary use
- Hunting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1898
- Type
- Rifle
- Origin
- United Kingdom
- Inventor
- Various British
- Manufacturer
- Eley Brothers; Kynoch
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Rare
- Case capacity
- 164.2 gr H₂O
- Twist (typical)
- 1:16.0
- Primer
- Large Rifle Magnum
- Case type
- Rimmed
- Max pressure
- 18,000 psi, CIP transducer
- Eff. range
- 150 yd
- Max range
- 750 yd
- Recoil
- 61.2 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .577/500 Nitro Express, 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 ⌀ | 12.90 | 0.508 | · |
| Neck ⌀ | 13.36 | 0.526 | · |
| Shoulder ⌀ | 14.86 | 0.585 | · |
| Shoulder angle | 12° | — | |
| Base ⌀ | 16.38 | 0.645 | · |
| Rim ⌀ | 18.21 | 0.717 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.40 | 0.055 | · |
| Neck length | 13.33 | 0.525 | |
| Case length | 79.50 | 3.130 | · |
| Overall length | 95.00 | 3.740 | · |
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. .577/500 Nitro Express is highlighted below.
Missing a dimension for .577/500 Nitro Express? 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.
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
The .577/500 Nitro Express is a bottleneck rimmed rifle cartridge originating in United Kingdom.
FAQs
- What twist rate does .577/500 Nitro Express use?
- .577/500 Nitro Express typically uses a 1:16.0 twist rate.
- What bullet diameter is .577/500 Nitro Express?
- .577/500 Nitro Express uses a 0.508″ (12.903 mm) diameter bullet.
- Is .577/500 Nitro Express still in production?
- .577/500 Nitro Express is discontinued; typical availability is rare.
- What is .577/500 Nitro Express used for?
- .577/500 Nitro Express is primarily used for hunting.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
