Rifle · CIP · Not SAAMI standardized · CIP standardizedObsolete
8x64mm S
Wilhelm Brenneke's 1912 rimless 8 mm (.323") cartridge, designed to fit standard Mauser 98 actions while giving more power than the 8x57 JS.
- Caliber
- 0.323″ · 8.2 mm
- Introduced
- 1912
- Case
- Rimless
- Primary use
- Hunting
- Status
- Obsolete
- Obsolete
- Obsolete
- Introduced
- 1912
- Type
- Rifle
- Origin
- Germany
- Inventor
- Wilhelm Brenneke
- Manufacturer
- Brenneke
- Standard
- CIP · Not SAAMI standardized · CIP standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Obsolete
- Availability
- Collector
- Case capacity
- 69.5 gr H₂O
- Twist (typical)
- 1:9.4
- Primer
- Large Rifle
- Case type
- Rimless
- Max pressure
- 58,740 psi, CIP transducer
- Eff. range
- 350 yd
- Max range
- 4650 yd
- Recoil
- 27.6–29.6 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 8x64mm S, 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 · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 8.20 | 0.323 | ✓ |
| Neck ⌀ | 8.96 | 0.353 | ✓ |
| Shoulder ⌀ | 10.85 | 0.427 | ✓ |
| Shoulder angle | 14° | — | ✓ |
| Base ⌀ | 11.95 | 0.470 | ✓ |
| Rim ⌀ | 12.00 | 0.472 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.30 | 0.051 | ✓ |
| Neck length | 8.41 | 0.331 | ≈ |
| Case length | 64.00 | 2.520 | ✓ |
| Overall length | 87.50 | 3.445 | ✓ |
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. 8x64mm S 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
The 8x64mm S was introduced in 1912 by Wilhelm Brenneke.
FAQs
- What twist rate does 8x64mm S use?
- 8x64mm S typically uses a 1:9.4 twist rate.
- What bullet diameter is 8x64mm S?
- 8x64mm S uses a 0.323″ (8.2 mm) diameter bullet.
- Is 8x64mm S still in production?
- 8x64mm S is obsolete; typical availability is collector.
- What is 8x64mm S used for?
- 8x64mm S is primarily used for hunting.
Sources & provenance
- Standard C.I.P. (Commission Internationale Permanente) — C.I.P. TDCC — 8 x 64 S (Tab. I, rimless, p.62) · bullet ⌀ archived
- Secondary Wikipedia — 8x64mm S · bullet ⌀, year, grain weights, velocity archived
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
