Rifle · SAAMI
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
- 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, SAAMI transducer
- Eff. range
- 600 yd
- Max range
- 6300 yd
- Recoil
- 20–25.7 ft·lb
Introduced by Weatherby
Ballistics
Published velocity/energy data isn't available for 7mm Weatherby Magnum. Parent case: .300 H&H 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 | 25° | — | |
| 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
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 is 7mm Weatherby Magnum based on?
- 7mm Weatherby Magnum is derived from the .300 H&H Magnum case.
- 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 American Hunter (NRA) — Behind the Bullet: 7mm Weatherby Magnum · parent_cartridge
- Manufacturer HandWiki — Engineering: 7mm Weatherby Magnum · parent_cartridge
- Manufacturer Weatherby, Inc. — 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 →
