Rifle · CIP
9.3x66mm Sako
Finnish proprietary cartridge designed by Sako for dangerous and large game in a short-action receiver; delivers full 9.3mm bore performance at reduced overall length..
- Caliber
- 0.3661″ · 9.3 mm
- Introduced
- 2002
- Case
- Rimless
- Parent
- 9x25mm Mauser Export
- Primary use
- Hunting
- Status
- Active
- Introduced
- 2002
- Type
- Rifle
- Origin
- Finland
- Inventor
- Sako
- Manufacturer
- Sako
- Standard
- CIP
- Status
- Active
- Availability
- Uncommon
- Case capacity
- 78.3 gr H₂O
- Twist (typical)
- 1:14.2
- Primer
- Boxer Large Rifle
- Case type
- Rimless
- Max pressure
- 60,192 psi, CIP transducer
- Eff. range
- 300 yd
- Max range
- 4600 yd
- Recoil
- 33.1–42.1 ft·lb
Introduced by Sako
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 9.3x66mm Sako, 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
- 9x25mm Mauser Export
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 ⌀ | 9.30 | 0.366 | ✓ |
| Neck ⌀ | 9.92 | 0.391 | ✓ |
| Shoulder ⌀ | 11.43 | 0.450 | ✓ |
| Shoulder angle | 17.5° | — | ✓ |
| Base ⌀ | 12.13 | 0.478 | ✓ |
| Rim ⌀ | 11.95 | 0.470 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.30 | 0.051 | ✓ |
| Neck length | 7.80 | 0.307 | ≈ |
| Case length | 66.00 | 2.598 | ✓ |
| Overall length | 85.00 | 3.346 | ✓ |
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. 9.3x66mm Sako is highlighted below.
Suitable powders
4 reloading powders listed for 9.3x66mm Sako, fastest to slowest. Cross-reference in the finder →
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
Sako developed the 9.3x66mm in 2003 to provide hunters with 9.3mm performance in the shorter Sako 85 action. It delivers ballistics comparable to the 9.3x62mm Mauser from a shorter, lighter rifle. CIP-standardized and chambered exclusively in Sako rifles, it has found a following among Finnish and Scandinavian hunters who pursue moose and bear.
FAQs
- What twist rate does 9.3x66mm Sako use?
- 9.3x66mm Sako typically uses a 1:14.2 twist rate.
- What bullet diameter is 9.3x66mm Sako?
- 9.3x66mm Sako uses a 0.3661″ (9.3 mm) diameter bullet.
- Is 9.3x66mm Sako still in production?
- 9.3x66mm Sako is active; typical availability is uncommon.
- What is 9.3x66mm Sako used for?
- 9.3x66mm Sako is primarily used for hunting.
- What is 9.3x66mm Sako based on?
- 9.3x66mm Sako is derived from the 9x25mm Mauser Export case.
- What are the best powders for 9.3x66mm Sako?
- Reloading powders commonly listed for 9.3x66mm Sako include N550, Vihtavuori N140, N540, Vihtavuori N150.
Sources & provenance
- Standard C.I.P. (Commission Internationale Permanente) — C.I.P. TDCC Tab I datasheet — 9,3 x 66 Sako · bullet ⌀ archived
- Manufacturer Federal Premium (Vista Outdoor) — Safari Cape-Shok Swift A-Frame .370 Sako Mag — P370SA · grain weights, velocity archived
- Secondary American Hunter (NRA) — Behind the Bullet: .370 Sako Magnum · 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 →
