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
- 52,000 CUP, SAAMI crusher
- Eff. range
- 300 yd
- Max range
- 3500 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
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 Z299.4-2025 — Centerfire Rifle Velocity & Pressure Data · grain_ballistics, representative_gun archived
- Standard C.I.P. — C.I.P. TDCC — Tables of Dimensions of Cartridges and Chambers
- Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
- Manufacturer Winchester Ammunition — Power-Point rifle ammunition — 358 Winchester, symbol X3582 · representative_gun, grain_ballistics
- Manufacturer DoubleTap — 358 Win 225gr. Sierra Game King 20rds · grain_ballistics, representative_gun
- Manufacturer Buffalo Bore Ammunition — Premium 358 Win. Supercharged — Item 41A (225 gr. Sierra SPTZ-BT) · grain_ballistics, representative_gun archived
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 →
