Pistol · Obsolete / Non-standard
.400 Cor-Bon
Cor-Bon's pistol cartridge using the .45 ACP case necked to .40 caliber.
- Caliber
- 0.401″ · 10.185 mm
- Introduced
- 1997
- Case
- Rimless
- Parent
- .45 ACP
- Primary use
- Self-Defense
- Status
- Discontinued
- Introduced
- 1997
- Type
- Pistol
- Origin
- United States
- Inventor
- Peter Pi
- Manufacturer
- Cor-Bon
- Standard
- Obsolete / Non-standard
- Status
- Discontinued
- Availability
- Collector
- Case capacity
- 25.5 gr H₂O
- Twist (typical)
- 1:16
- Primer
- Boxer Small Pistol
- Case type
- Rimless
- Max pressure
- 29,000 psi, SAAMI transducer
- Eff. range
- 50 yd
- Max range
- 2400 yd
- Recoil
- 8–8.7 ft·lb
- Subsonic
- Capable
Introduced by Cor-Bon
Ballistics
Published velocity/energy data isn't available for .400 Cor-Bon — an obsolete/collector cartridge. Parent case: .45 ACP.
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 ⌀ | 10.19 | 0.401 | · |
| Neck ⌀ | 10.74 | 0.423 | · |
| Shoulder ⌀ | 11.91 | 0.469 | · |
| Shoulder angle | 25° | — | ~ |
| Base ⌀ | 11.94 | 0.470 | · |
| Rim ⌀ | 11.96 | 0.471 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.27 | 0.050 | · |
| Neck length | 3.87 | 0.152 | ≈ |
| Case length | 22.81 | 0.898 | · |
| Overall length | 30.48 | 1.200 | · |
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. .400 Cor-Bon 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.
Lineage
History
Developed by Cor-Bon in the late 1990s as a high-performance pistol round using the .45 ACP case necked down to .40 caliber. Produces .40 S&W-comparable velocities from a 1911 pistol with minimal modification. Never achieved significant commercial success despite its performance advantage.
FAQs
- What twist rate does .400 Cor-Bon use?
- .400 Cor-Bon typically uses a 1:16 twist rate.
- What bullet diameter is .400 Cor-Bon?
- .400 Cor-Bon uses a 0.401″ (10.185 mm) diameter bullet.
- Is .400 Cor-Bon still in production?
- .400 Cor-Bon is discontinued; typical availability is collector.
- What is .400 Cor-Bon used for?
- .400 Cor-Bon is primarily used for self-defense.
- What is .400 Cor-Bon based on?
- .400 Cor-Bon is derived from the .45 ACP case.
Sources & provenance
- Standard SAAMI — SAAMI cartridge & chamber drawing — .400 Cor-Bon
- Reference Wikipedia: .400 Cor-Bon (citing Barnes CotW 11th ed. + SAAMI + Cor-Bon load data) · parent_cartridge
- Secondary Lee Precision — 400 Cor Bon dies (case-forming from .45 ACP) · parent_cartridge
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 →
