Autocannon · Not SAAMI standardized · Not standardizedObsolete
23x115mm
23x115mm is a rimless bottlenecked autocannon cartridge of Soviet Union origin.
- Caliber
- 0.9055″ · 23 mm
- Introduced
- 1943
- Case
- Rimless
- Parent
- 14.5x114mm Soviet
- Primary use
- Military
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1943
- Type
- Autocannon
- Origin
- Soviet Union
- Inventor
- OKB-16
- Manufacturer
- Soviet Union state arsenals
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Rare
- Case capacity
- 679.9 gr H₂O
- Twist (typical)
- 1:20
- Primer
- Large Rifle
- Case type
- Rimless
- Max pressure
- 42,685 psi, CIP transducer
- Eff. range
- 1500 yd
- Max range
- 4500 yd
- Recoil
- 1,161.1–1,196 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 23x115mm, 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
- 14.5x114mm Soviet
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 · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 23.00 | 0.906 | · |
| Neck ⌀ | 24.00 | 0.945 | · |
| Shoulder ⌀ | 26.26 | 1.034 | · |
| Shoulder angle | 23° | — | |
| Base ⌀ | 26.95 | 1.061 | · |
| Rim ⌀ | 26.95 | 1.061 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 2.50 | 0.098 | |
| Neck length | 23.75 | 0.935 | |
| Case length | 115.00 | 4.528 | · |
| Overall length | 204.00 | 8.031 | · |
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. 23x115mm is highlighted below.
Missing a dimension for 23x115mm? 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 1943 by OKB-16, derived from the 14.5x114mm Soviet.
FAQs
- What twist rate does 23x115mm use?
- 23x115mm typically uses a 1:20 twist rate.
- What bullet diameter is 23x115mm?
- 23x115mm uses a 0.9055″ (23 mm) diameter bullet.
- Is 23x115mm still in production?
- 23x115mm is discontinued; typical availability is rare.
- What is 23x115mm used for?
- 23x115mm is primarily used for military.
- What is 23x115mm based on?
- 23x115mm is derived from the 14.5x114mm Soviet 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 →
