Rifle · CIP
11.5x51mm
11.5x51mm is a belted straight-walled rifle cartridge of Germany origin.
- Caliber
- 0.4524″ · 11.49 mm
- Introduced
- 2009
- Case
- Belted
- Parent
- .458x2" American
- Primary use
- Hunting
- Status
- Active
- Introduced
- 2009
- Type
- Rifle
- Origin
- Germany
- Inventor
- Sascha Thiemann
- Manufacturer
- Sascha Thiemann
- Standard
- CIP
- Status
- Active
- Availability
- Limited
- Case capacity
- 74.9 gr H₂O
- Twist (typical)
- 1:20.0
- Primer
- Large Rifle Magnum
- Case type
- Belted
- Max pressure
- 58,015 psi, CIP transducer
- Eff. range
- 250 yd
- Max range
- 1250 yd
- Recoil
- 19.5–27.2 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 11.5x51mm, 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
- .458x2" American
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 · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 11.49 | 0.452 | ✓ |
| Neck ⌀ | 12.25 | 0.482 | |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 13.03 | 0.513 | ✓ |
| Rim ⌀ | 13.51 | 0.532 | ✓ |
| Belt ⌀ | 13.51 | 0.532 | ✓ |
| Rim thickness | 1.27 | 0.050 | ✓ |
| Neck length | n/a | ||
| Case length | 51.20 | 2.016 | ✓ |
| Overall length | 62.00 | 2.441 | ✓ |
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. 11.5x51mm is highlighted below.
Missing a dimension for 11.5x51mm? 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.
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
Introduced around 2009.
FAQs
- What twist rate does 11.5x51mm use?
- 11.5x51mm typically uses a 1:20.0 twist rate.
- What bullet diameter is 11.5x51mm?
- 11.5x51mm uses a 0.4524″ (11.49 mm) diameter bullet.
- Is 11.5x51mm still in production?
- 11.5x51mm is active; typical availability is limited.
- What is 11.5x51mm used for?
- 11.5x51mm is primarily used for hunting.
- What is 11.5x51mm based on?
- 11.5x51mm is derived from the .458x2" American 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 →
