Rifle · Not SAAMI standardized · Not standardizedObsolete
6 Bore
The 6 bore (6 gauge) is an obsolete 19th-century big-bore calibre (.919 in) used in black-powder shotguns and dangerous-game rifles; late breech-loaders fired metallic cartridges..
- Caliber
- 0.919″ · 23.343 mm
- Introduced
- 1870
- Case
- Rimmed
- Primary use
- Hunting
- Status
- Obsolete
- Obsolete
- Obsolete
- Introduced
- 1870
- Type
- Rifle
- Origin
- United Kingdom
- Inventor
- Various British
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Obsolete
- Availability
- Collector
- Case capacity
- 691.3 gr H₂O
- Twist (typical)
- 1:20
- Primer
- Large Rifle Magnum
- Case type
- Rimmed
- Max pressure
- 25,400 psi, CIP transducer
- Eff. range
- 300 yd
- Max range
- 1500 yd
- Recoil
- 970.7 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 6 Bore, so this is the shape gravity alone gives the advertised velocity. Drag would steepen it. The tool below solves real loads through their published G1 or G7 model.
Open in Ballistic Compare- Parent case
- —
Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
Wikipedia · secondary source| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 23.34 | 0.919 | · |
| Neck ⌀ | 24.57 | 0.967 | |
| Shoulder ⌀ | — | — | |
| Shoulder angle | — | — | |
| Base ⌀ | 26.15 | 1.030 | |
| Rim ⌀ | 30.25 | 1.191 | |
| Belt ⌀ | — | — | |
| Rim thickness | 3.50 | 0.138 | |
| Neck length | — | — | |
| Case length | 124.79 | 4.913 | |
| Overall length | 157.32 | 6.194 |
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. 6 Bore is highlighted below.
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 6 bore cartridge rifle was built by W.W. Greener in 1891.
FAQs
- What twist rate does 6 Bore use?
- 6 Bore typically uses a 1:20 twist rate.
- What bullet diameter is 6 Bore?
- 6 Bore uses a 0.919″ (23.343 mm) diameter bullet.
- Is 6 Bore still in production?
- 6 Bore is obsolete; typical availability is collector.
- What is 6 Bore used for?
- 6 Bore is primarily used for hunting.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
