Rifle · CIP
4 Bore Rifle
4 Bore Rifle is a rimmed straight-walled rifle cartridge of United States origin.
- Caliber
- 1″ · 25.4 mm
- Introduced
- 1870
- Case
- Rimmed
- Primary use
- Hunting
- Status
- Active
- Introduced
- 1870
- Type
- Rifle
- Origin
- United Kingdom
- Inventor
- Various British
- Manufacturer
- Eley Brothers; Kynoch
- Standard
- CIP
- Status
- Active
- Availability
- Limited
- Case capacity
- 691.3 gr H₂O
- Primer
- Large Rifle Magnum
- Case type
- Rimmed
- Max pressure
- 36,260 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 4 Bore Rifle, 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.
CIP TDCC · secondary source| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 25.40 | 1.000 | ✓ |
| Neck ⌀ | 27.18 | 1.070 | · |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 28.00 | 1.102 | ✓ |
| Rim ⌀ | 31.30 | 1.232 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.50 | 0.059 | ✓ |
| Neck length | n/a | ||
| Case length | 101.50 | 3.996 | ✓ |
| Overall length | 119.30 | 4.697 | ✓ |
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. 4 Bore Rifle 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
The 4 Bore Rifle is a straight rimmed rifle cartridge originating in United States.
FAQs
- What bullet diameter is 4 Bore Rifle?
- 4 Bore Rifle uses a 1″ (25.4 mm) diameter bullet.
- Is 4 Bore Rifle still in production?
- 4 Bore Rifle is active; typical availability is limited.
- What is 4 Bore Rifle used for?
- 4 Bore Rifle 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 →
