Rifle · Military · Not SAAMI standardized · Not standardizedObsolete
8x52mmR Siamese
Rimmed military cartridge developed for the Thai (Siamese) Type 45 Mauser-pattern rifles; visually similar to the 8x50R Mannlicher but dimensionally distinct and not interchangeable..
- Caliber
- 0.321″ · 8.153 mm
- Introduced
- 1923
- Case
- Rimmed
- Parent
- 8x50mmR Mannlicher
- Primary use
- Hunting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1923
- Type
- Rifle
- Origin
- Thailand
- Inventor
- Siamese / Thai military
- Manufacturer
- Thailand state arsenals
- Standard
- Military · Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Rare
- Case capacity
- 52.9 gr H₂O
- Twist (typical)
- 1:10
- Primer
- Berdan Large Rifle
- Case type
- Rimmed
- Max pressure
- 45,000 psi, CIP transducer
- Eff. range
- 500 yd
- Max range
- 4150 yd
- Recoil
- 13.2–15.2 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 8x52mmR Siamese, 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
- 8x50mmR Mannlicher
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.
mixed/other · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 8.15 | 0.321 | · |
| Neck ⌀ | 8.81 | 0.347 | ~ |
| Shoulder ⌀ | 11.68 | 0.460 | ~ |
| Shoulder angle | 14.5° | — | |
| Base ⌀ | 12.70 | 0.500 | · |
| Rim ⌀ | 13.97 | 0.550 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.40 | 0.055 | ~ |
| Neck length | 8.41 | 0.331 | |
| Case length | 51.82 | 2.040 | · |
| Overall length | 75.18 | 2.960 | · |
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. 8x52mmR Siamese is highlighted below.
Missing a dimension for 8x52mmR Siamese? 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
Parent case
Connected reference
History
Developed around 1902 for the Siamese (Thai) Type 45 Mauser rifle, the 8x52mmR Siamese is unique to Thailand and not interchangeable with other 8mm rimmed cartridges despite superficial similarities. Surplus rifles and small lots of ammunition still surface in collections.
FAQs
- What twist rate does 8x52mmR Siamese use?
- 8x52mmR Siamese typically uses a 1:10 twist rate.
- What bullet diameter is 8x52mmR Siamese?
- 8x52mmR Siamese uses a 0.321″ (8.153 mm) diameter bullet.
- Is 8x52mmR Siamese still in production?
- 8x52mmR Siamese is discontinued; typical availability is rare.
- What is 8x52mmR Siamese used for?
- 8x52mmR Siamese is primarily used for hunting.
- What is 8x52mmR Siamese based on?
- 8x52mmR Siamese is derived from the 8x50mmR Mannlicher case.
Sources & provenance
- Reference Gun Digest Books (Krause) — Cartridges of the World · velocity, bullet ⌀, year, grain weights
- Secondary Wikipedia — Siamese Mauser style rifle · year archived
- Secondary Vickers MG Collection & Research Association — 8x52R Siamese · velocity, grain weights, bullet ⌀ 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 →
