Rifle · CIP
8x57mm IR
The 8x57mm IR (JR) is the rimmed form of the 8x57 I cartridge, using the original 8.09 mm (.318 in) bore, for drillings and break-action rifles.
- Caliber
- 0.3185″ · 8.09 mm
- Introduced
- 1893
- Case
- Rimmed
- Parent
- 8x57mm J (8x57 I)
- Primary use
- Hunting
- Status
- Active
- Introduced
- 1893
- Type
- Rifle
- Origin
- Germany
- Inventor
- Various German commercial
- Manufacturer
- RWS
- Standard
- CIP
- Status
- Active
- Availability
- Limited
- Case capacity
- 63 gr H₂O
- Twist (typical)
- 1:9.4
- Primer
- Large Rifle
- Case type
- Rimmed
- Max pressure
- 46,412 psi, CIP transducer
- Eff. range
- 300 yd
- Max range
- 4050 yd
- Recoil
- 14–18 ft·lb
Introduced by RWS
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 8x57mm IR, 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
- 8x57mm J (8x57 I)
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 · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 8.09 | 0.319 | ✓ |
| Neck ⌀ | 8.99 | 0.354 | ✓ |
| Shoulder ⌀ | 10.95 | 0.431 | ✓ |
| Shoulder angle | 18.1° | — | ≈ |
| Base ⌀ | 11.92 | 0.469 | ✓ |
| Rim ⌀ | 13.32 | 0.524 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.40 | 0.055 | ✓ |
| Neck length | 8.01 | 0.315 | ≈ |
| Case length | 57.00 | 2.244 | ✓ |
| Overall length | 82.00 | 3.228 | ✓ |
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. 8x57mm IR 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.
Lineage
Connected reference
History
Rimmed variant of the German 8x57 I for combination guns.
FAQs
- What twist rate does 8x57mm IR use?
- 8x57mm IR typically uses a 1:9.4 twist rate.
- What bullet diameter is 8x57mm IR?
- 8x57mm IR uses a 0.3185″ (8.09 mm) diameter bullet.
- Is 8x57mm IR still in production?
- 8x57mm IR is active; typical availability is limited.
- What is 8x57mm IR used for?
- 8x57mm IR is primarily used for hunting.
- What is 8x57mm IR based on?
- 8x57mm IR is derived from the 8x57mm J (8x57 I) case.
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 →
