Rifle · SAAMI
.358 Winchester
A large-caliber cartridge on the .308 case, ideal for timber hunting where heavy bullets at moderate velocity dominate..
- Caliber
- 0.358″ · 9.093 mm
- Introduced
- 1955
- Case
- Rimless
- Parent
- .308 Winchester
- Primary use
- Hunting, Big Game
- Status
- Active
- Introduced
- 1955
- Type
- Rifle
- Origin
- United States
- Inventor
- Winchester
- Manufacturer
- Winchester Ammunition
- Standard
- SAAMI
- Status
- Active
- Availability
- Common
- Case capacity
- 57 gr H₂O
- Twist (typical)
- 1:12
- Primer
- Large Rifle
- Case type
- Rimless
- Max pressure
- 60,000 psi
- Eff. range
- 300 yd
- Max range
- 700 yd
- Recoil
- 22–30 ft·lb
Introduced by Winchester Ammunition
Ballistics
Published velocity/energy data isn't available for .358 Winchester. Parent case: .308 Winchester.
Performance
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 ⌀ | 9.09 | 0.358 | ✓ |
| Neck ⌀ | 9.86 | 0.388 | ✓ |
| Shoulder ⌀ | 11.53 | 0.454 | ✓ |
| Shoulder angle | 20° | — | ✓ |
| Base ⌀ | 11.94 | 0.470 | ✓ |
| Rim ⌀ | 12.01 | 0.473 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.37 | 0.054 | ✓ |
| Neck length | 9.27 | 0.365 | ≈ |
| Case length | 51.18 | 2.015 | ✓ |
| Overall length | 70.61 | 2.780 | ✓ |
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. .358 Winchester is highlighted below.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
Suitable powders
1 reloading powder listed for .358 Winchester, 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.
Firearms chambered in .358 Winchester
12 models in the database chamber .358 Winchester. Browse all →
Lineage
Connected reference
History
Winchester introduced it in 1955 for the Model 70 and Model 88 lever action. Perfect for close-range big game in dense timber. Never achieved commercial success proportional to its effectiveness.
FAQs
- What twist rate does .358 Winchester use?
- .358 Winchester typically uses a 1:12 twist rate.
- What bullet diameter is .358 Winchester?
- .358 Winchester uses a 0.358″ (9.093 mm) diameter bullet.
- Is .358 Winchester still in production?
- .358 Winchester is active; typical availability is common.
- What is .358 Winchester used for?
- .358 Winchester is primarily used for hunting, big game.
- What is .358 Winchester based on?
- .358 Winchester is derived from the .308 Winchester case.
- What are the best powders for .358 Winchester?
- Reloading powders commonly listed for .358 Winchester include IMR 3031.
Sources & provenance
- Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
- Standard C.I.P. — C.I.P. TDCC — Tables of Dimensions of Cartridges and Chambers
- Standard SAAMI — ANSI/SAAMI Z299.4-2025 — Centerfire Rifle Velocity & Pressure Data · grain_ballistics, representative_gun archived
- Manufacturer Winchester Ammunition — Power-Point rifle ammunition — 358 Winchester, symbol X3582 · grain_ballistics, representative_gun
- Manufacturer Buffalo Bore Ammunition — Premium 358 Win. Supercharged — Item 41A (225 gr. Sierra SPTZ-BT) · grain_ballistics, representative_gun archived
- Manufacturer DoubleTap Ammunition — 358 Win 225gr. Sierra Game King 20rds · grain_ballistics, representative_gun
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 43 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →