Pistol · Not SAAMI standardized · Not standardizedObsolete
.40 Super
Enhanced .45 ACP variant with lengthened case for greater powder capacity.
- Caliber
- 0.4″ · 10.16 mm
- Introduced
- 1996
- Case
- Rimless
- Parent
- .45 Winchester Magnum
- Primary use
- Self-Defense
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1996
- Type
- Pistol
- Origin
- United States
- Inventor
- Peter Pi / Triton Cartridge
- Manufacturer
- Triton
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Collector
- Case capacity
- 26.5 gr H₂O
- Twist (typical)
- 1:16
- Primer
- Boxer Small Pistol
- Case type
- Rimless
- Max pressure
- 37,000 psi, SAAMI transducer
- Eff. range
- 50 yd
- Max range
- 2650 yd
- Recoil
- 8–10.9 ft·lb
- Subsonic
- Capable
Ballistics
Published velocity/energy data isn't available for .40 Super — an obsolete/collector cartridge. Parent case: .45 Winchester Magnum.
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 · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 10.16 | 0.400 | ✓ |
| Neck ⌀ | 10.77 | 0.424 | ✓ |
| Shoulder ⌀ | 12.01 | 0.473 | ✓ |
| Shoulder angle | 25° | — | ✓ |
| Base ⌀ | 11.96 | 0.471 | ✓ |
| Rim ⌀ | 12.06 | 0.475 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.24 | 0.049 | ✓ |
| Neck length | 4.34 | 0.171 | ≈ |
| Case length | 25.10 | 0.988 | ✓ |
| Overall length | 31.73 | 1.249 | ✓ |
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. .40 Super 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.
Firearms chambered in .40 Super
Lineage
History
Developed in the late 1990s by Dean Grennell and CorBon Ammunition as a high-performance .45 ACP variant. The lengthened case holds significantly more powder, producing .45 Colt-comparable velocities in a 1911 platform. Requires reinforced pistols; remains a niche market item.
FAQs
- What twist rate does .40 Super use?
- .40 Super typically uses a 1:16 twist rate.
- What bullet diameter is .40 Super?
- .40 Super uses a 0.4″ (10.16 mm) diameter bullet.
- Is .40 Super still in production?
- .40 Super is discontinued; typical availability is collector.
- What is .40 Super used for?
- .40 Super is primarily used for self-defense.
- What is .40 Super based on?
- .40 Super is derived from the .45 Winchester Magnum case.
Sources & provenance
- Standard SAAMI — SAAMI cartridge & chamber drawing — .40 Super archived
- Standard Obsolete — no current SAAMI or CIP standard
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 →
