Rifle · Not SAAMI standardized · Not standardizedObsolete
.458 Express
.458 Express is a belted straight-walled rifle cartridge of South Africa origin.
- Caliber
- 0.458″ · 11.633 mm
- Introduced
- 2000
- Case
- Belted
- Primary use
- Hunting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 2000
- Type
- Rifle
- Origin
- South Africa
- Inventor
- Professor Koos Badenhorst
- Manufacturer
- Professor Koos Badenhorst
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Rare
- Case capacity
- 90 gr H₂O
- Twist (typical)
- 1:16
- Primer
- Large Rifle
- Case type
- Belted
- Max pressure
- 22,000 psi, CIP transducer
- Eff. range
- 250 yd
- Max range
- 1250 yd
- Recoil
- 16.5–20.7 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .458 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.
Dimensions · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 11.63 | 0.458 | · |
| Neck ⌀ | 12.25 | 0.482 | |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 13.03 | 0.513 | |
| Rim ⌀ | 13.51 | 0.532 | |
| Belt ⌀ | 13.51 | 0.532 | |
| Rim thickness | 1.27 | 0.050 | |
| Neck length | n/a | ||
| Case length | 60.13 | 2.367 | |
| Overall length | 75.95 | 2.990 | · |
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. .458 Express is highlighted below.
Missing a dimension for .458 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
Developed by Professor Koos Badenhorst.
FAQs
- What twist rate does .458 Express use?
- .458 Express typically uses a 1:16 twist rate.
- What bullet diameter is .458 Express?
- .458 Express uses a 0.458″ (11.633 mm) diameter bullet.
- Is .458 Express still in production?
- .458 Express is discontinued; typical availability is rare.
- What is .458 Express used for?
- .458 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 →
