Rifle · Obsolete
.351 Winchester
Winchester's early semi-rimless self-loading cartridge for the Model 1907 rifle.
- Caliber
- 0.351″ · 8.915 mm
- Introduced
- 1907
- Case
- Rimless
- Primary use
- Hunting
- Status
- Discontinued
- Introduced
- 1907
- Type
- Rifle
- Origin
- United States
- Inventor
- Winchester
- Manufacturer
- Winchester Repeating Arms
- Standard
- Obsolete
- Status
- Discontinued
- Availability
- Collector
- Case capacity
- 32 gr H₂O
- Twist (typical)
- 1:16
- Primer
- Boxer Small Rifle
- Case type
- Rimless
- Max pressure
- 39,000 psi
- Eff. range
- 150 yd
- Recoil
- 7–10 ft·lb
- Subsonic
- Capable
Introduced by Winchester Repeating Arms
Ballistics
Published velocity/energy data isn't available for .351 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.
Wikipedia · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 8.91 | 0.351 | ~ |
| Neck ⌀ | 9.47 | 0.373 | · |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 9.65 | 0.380 | · |
| Rim ⌀ | 10.34 | 0.407 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.27 | 0.050 | · |
| Neck length | n/a | ||
| Case length | 35.05 | 1.380 | · |
| Overall length | 48.41 | 1.906 | ~ |
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. .351 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.
Connected reference
History
Winchester introduced this semi-rimless cartridge in 1907 for their Model 1907 semi-automatic police rifle. Designed for reliable function in a blow-back operated action. Used by some police forces and exported to France in WWI. Discontinued when the semi-auto rifle market consolidated.
FAQs
- What twist rate does .351 Winchester use?
- .351 Winchester typically uses a 1:16 twist rate.
- What bullet diameter is .351 Winchester?
- .351 Winchester uses a 0.351″ (8.915 mm) diameter bullet.
- Is .351 Winchester still in production?
- .351 Winchester is discontinued; typical availability is collector.
- What is .351 Winchester used for?
- .351 Winchester is primarily used for hunting.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 2 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →