Rifle · CIP · Not SAAMI standardized · CIP standardizedObsolete
.40-82 Winchester
Heavy Winchester lever-action cartridge from 1886 for large game and bison.
- Caliber
- 0.4059″ · 10.31 mm
- Introduced
- 1886
- Case
- Rimless
- Primary use
- Hunting
- Status
- Obsolete
- Obsolete
- Obsolete
- Introduced
- 1886
- Type
- Rifle
- Origin
- United States
- Inventor
- Winchester
- Manufacturer
- Winchester Repeating Arms
- Standard
- CIP · Not SAAMI standardized · CIP standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Obsolete
- Availability
- Antique
- Case capacity
- 82 gr H₂O
- Twist (typical)
- 1:18
- Primer
- Boxer Large Rifle
- Case type
- Rimless
- Max pressure
- 24,000 psi, CIP transducer
- Eff. range
- 200 yd
- Max range
- 3750 yd
- Recoil
- 12–18 ft·lb
- Subsonic
- Capable
Introduced by Winchester Repeating Arms
Ballistics
Published velocity/energy data isn't available for .40-82 Winchester — an obsolete/collector cartridge.
Performance
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
CIP TDCC · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 10.31 | 0.406 | ~ |
| Neck ⌀ | 10.86 | 0.428 | · |
| Shoulder ⌀ | 11.54 | 0.454 | · |
| Shoulder angle | 4.6° | — | ~ |
| Base ⌀ | 12.92 | 0.509 | · |
| Rim ⌀ | 15.49 | 0.610 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.78 | 0.070 | · |
| Neck length | 11.44 | 0.450 | ≈ |
| Case length | 60.71 | 2.390 | · |
| Overall length | 70.23 | 2.765 | ~ |
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. .40-82 Winchester 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 .40-82 Winchester
History
Introduced by Winchester in 1886 for the Winchester Model 1886 lever-action rifle. A heavy black powder cartridge designed for large North American game. Fired 260-grain bullets at modest velocity. Competed with similar offerings from Sharps and Ballard; rendered obsolete by smokeless powder cartridges.
FAQs
- What twist rate does .40-82 Winchester use?
- .40-82 Winchester typically uses a 1:18 twist rate.
- What bullet diameter is .40-82 Winchester?
- .40-82 Winchester uses a 0.4059″ (10.31 mm) diameter bullet.
- Is .40-82 Winchester still in production?
- .40-82 Winchester is obsolete; typical availability is antique.
- What is .40-82 Winchester used for?
- .40-82 Winchester is primarily used for hunting.
Sources & provenance
- Standard C.I.P. — C.I.P. TDCC — Tables of Dimensions of Cartridges and Chambers
- Standard SAAMI — SAAMI cartridge & chamber drawing — .40-82 Winchester archived
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 4 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
