Rifle · Obsolete
.315 Bore
British sporting rifle cartridge used primarily in India and Africa.
- Caliber
- 0.3236″ · 8.22 mm
- Introduced
- 1920
- Case
- Rimless
- Primary use
- Hunting
- Status
- Obsolete
- Introduced
- 1920
- Type
- Rifle
- Origin
- United Kingdom
- Inventor
- Various British commercial
- Manufacturer
- British gunsmiths / Kynoch
- Standard
- Obsolete
- Status
- Obsolete
- Availability
- Antique
- Case capacity
- 45 gr H₂O
- Twist (typical)
- 1:12
- Primer
- Boxer Small Rifle
- Case type
- Rimless
- Max pressure
- 25,000 psi
- Eff. range
- 300 yd
- Recoil
- 8–12 ft·lb
Ballistics
Published velocity/energy data isn't available for .315 Bore — 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 ⌀ | 8.22 | 0.324 | ~ |
| Neck ⌀ | 9.03 | 0.356 | · |
| Shoulder ⌀ | 12.01 | 0.473 | · |
| Shoulder angle | — | — | |
| Base ⌀ | 12.48 | 0.491 | · |
| Rim ⌀ | 14.11 | 0.556 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.38 | 0.054 | · |
| Neck length | — | — | |
| Case length | 50.38 | 1.983 | · |
| Overall length | 76.21 | 3.000 | · |
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. .315 Bore is highlighted below.
Missing a dimension for .315 Bore? Some case measurements aren't in a published SAAMI/CIP drawing yet. Have a factory or reamer print? Send it → — verified hard-to-find data earns a free Lindcott sticker.
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
A British sporting cartridge developed for use in India and colonial Africa. The .315 bore was chambered in various British sporting rifles for medium game hunting. Never standardized by SAAMI or CIP, it remained a niche British sporting caliber through the early 20th century.
FAQs
- What twist rate does .315 Bore use?
- .315 Bore typically uses a 1:12 twist rate.
- What bullet diameter is .315 Bore?
- .315 Bore uses a 0.3236″ (8.22 mm) diameter bullet.
- Is .315 Bore still in production?
- .315 Bore is obsolete; typical availability is antique.
- What is .315 Bore used for?
- .315 Bore is primarily used for hunting.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 3 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →