Rifle · SAAMI standardized
7mm Weatherby Magnum
Roy Weatherby's belted magnum cartridge from 1945.
- Caliber
- 0.284″ · 7.214 mm
- Introduced
- 1945
- Case
- Belted
- Parent
- .300 H&H Magnum
- Primary use
- Hunting
- Status
- Active
- Introduced
- 1945
- Type
- Rifle
- Origin
- United States
- Inventor
- Roy Weatherby
- Manufacturer
- Weatherby
- Standard
- SAAMI standardized
- Status
- Active
- Availability
- Specialty
- Case capacity
- 82 gr H₂O
- Twist (typical)
- 1:10
- Primer
- Boxer Large Rifle
- Case type
- Belted
- Max pressure
- 65,000 psi
- Eff. range
- 600 yd
- Recoil
- 15–20 ft·lb
Introduced by Weatherby
Ballistics
Published velocity/energy data isn't available for 7mm Weatherby Magnum.
Performance
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
SAAMI · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 7.21 | 0.284 | ✓ |
| Neck ⌀ | 7.92 | 0.312 | ~ |
| Shoulder ⌀ | 12.50 | 0.492 | ✓ |
| Shoulder angle | — | — | |
| Base ⌀ | 13.00 | 0.512 | ✓ |
| Rim ⌀ | 13.50 | 0.531 | ~ |
| Belt ⌀ | 13.50 | 0.531 | ✓ |
| Rim thickness | 1.24 | 0.049 | ✓ |
| Neck length | 8.41 | 0.331 | ≈ |
| Case length | 64.74 | 2.549 | ✓ |
| Overall length | 85.34 | 3.360 | ✓ |
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. 7mm Weatherby Magnum is highlighted below.
Missing a dimension for 7mm Weatherby Magnum? 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.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
Suitable powders
4 reloading powders listed for 7mm Weatherby Magnum, 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 7mm Weatherby Magnum
12 models in the database chamber 7mm Weatherby Magnum. Browse all →
Lineage
Connected reference
History
Roy Weatherby developed this belted magnum in 1945 as one of his earliest proprietary cartridges. Designed for long-range hunting of North American and African game, it predates and directly influenced the 7mm Remington Magnum introduced in 1962. Still chambered in Weatherby Mark V rifles.
FAQs
- What twist rate does 7mm Weatherby Magnum use?
- 7mm Weatherby Magnum typically uses a 1:10 twist rate.
- What bullet diameter is 7mm Weatherby Magnum?
- 7mm Weatherby Magnum uses a 0.284″ (7.214 mm) diameter bullet.
- Is 7mm Weatherby Magnum still in production?
- 7mm Weatherby Magnum is active; typical availability is specialty.
- What is 7mm Weatherby Magnum used for?
- 7mm Weatherby Magnum is primarily used for hunting.
- What are the best powders for 7mm Weatherby Magnum?
- Reloading powders commonly listed for 7mm Weatherby Magnum include N560, Norma MRP, Vihtavuori N160, N165.
Sources & provenance
- Standard SAAMI — SAAMI cartridge & chamber drawing — 7mm Weatherby Magnum archived
- Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
- Manufacturer Weatherby, Inc. — 7mm Weatherby Magnum · parent_cartridge
- Manufacturer HandWiki — Engineering: 7mm Weatherby Magnum · parent_cartridge
- Manufacturer American Hunter (NRA) — Behind the Bullet: 7mm Weatherby Magnum · parent_cartridge
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 14 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →