Rifle · SAAMI · Not SAAMI standardized · CIP standardizedObsolete
.351 Winchester Self-Loading
Early semi-automatic rifle cartridge for the Winchester Model 1907 — one of America's first successful semi-automatic sporting rifles.
- Caliber
- 0.3515″ · 8.915 mm
- Introduced
- 1906
- Case
- Semi-Rimmed
- Primary use
- Hunting, Military
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1906
- Type
- Rifle
- Origin
- United States
- Inventor
- Winchester
- Manufacturer
- Winchester Repeating Arms
- Standard
- SAAMI · Not SAAMI standardized · CIP standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Collector
- Case capacity
- 26.6 gr H₂O
- Twist (typical)
- 1:16
- Primer
- Large Pistol
- Case type
- Semi-Rimmed
- Max pressure
- 52,939 psi, CIP transducer
- Eff. range
- 150 yd
- Max range
- 3500 yd
- Recoil
- 7–10 ft·lb
- Subsonic
- Capable
Introduced by Winchester Repeating Arms
Ballistics
Published velocity/energy data isn't available for .351 Winchester Self-Loading — 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 ⌀ | 8.91 | 0.351 | ~ |
| Neck ⌀ | 9.58 | 0.377 | · |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 9.66 | 0.381 | · |
| Rim ⌀ | 10.41 | 0.410 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.27 | 0.050 | · |
| Neck length | n/a | ||
| Case length | 35.05 | 1.380 | · |
| Overall length | 48.26 | 1.900 | ~ |
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 Self-Loading 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 .351 Winchester Self-Loading
Lineage
History
Introduced in 1905 for the Winchester Model 1907, a blowback semi-automatic rifle considered advanced for its time. France purchased large numbers during WWI for pilots, cavalry, and vehicle crews who needed a compact semi-automatic weapon. Russia also purchased the Model 1907. The cartridge and rifle were commercially available until the 1950s; factory ammunition production has ended. Original Model 1907 rifles in good condition are collector items.
FAQs
- What twist rate does .351 Winchester Self-Loading use?
- .351 Winchester Self-Loading typically uses a 1:16 twist rate.
- What bullet diameter is .351 Winchester Self-Loading?
- .351 Winchester Self-Loading uses a 0.3515″ (8.915 mm) diameter bullet.
- Is .351 Winchester Self-Loading still in production?
- .351 Winchester Self-Loading is discontinued; typical availability is collector.
- What is .351 Winchester Self-Loading used for?
- .351 Winchester Self-Loading is primarily used for hunting, military.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 19 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
