Lindcott Armory Rifle · SAAMI standardized
.375 Weatherby Magnum
Weatherby's belted magnum cartridge for large game.
- Introduced
- 1944
- Type
- Rifle
- Origin
- United States
- Inventor
- Roy Weatherby
- Manufacturer
- Weatherby
- Standard
- SAAMI standardized
- Status
- Active
- Availability
- Specialty
- Bullet ⌀
- 0.375″
- Case capacity
- 110 gr H₂O
- Twist
- 1:12
- Primer
- Boxer Large Rifle
- Case type
- Belted
- Max pressure
- 62,000 psi
- Eff. range
- 400 yd
- Recoil
- 40–55 ft·lb
Ballistics
- Velocity
- 2,700–2,900 fps
- Energy
- 4,224–5,008 ft·lb
- By real loads
- 2,530–2,940 fps · 15 loads
- Typical MSRP
- $1.60/rd · price history →
- Parent case
- —
Representative trajectory — modeled from a single velocity input, not a measured load. Real published loads span the "by real loads" range above.
Factory loads
In production — 15 active loads across 6 brands. Top 15 shown.
| Brand | Load | Grain | Bullet | FPS | ft·lb | BC | $/rd |
|---|---|---|---|---|---|---|---|
| Federal | Premium | 270 | Partition | 2,800 | 4,699 | 0.459 | $0.85 |
| Nosler | Trophy Grade | 260 | AccuBond | 2,940 | 4,989 | — | $0.85 |
| Hornady | Custom | 270 | SP | 2,900 | 5,041 | — | $0.85 |
| Barnes | VOR-TX | 270 | TTSX BT | 2,900 | 5,041 | — | $0.85 |
| Norma | Bondstrike/Oryx | 270 | Bonded Soft Point | 2,800 | 4,699 | — | $2.75 |
| Norma | Dedicated Hunter | 270 | Bonded Soft Point | 2,800 | 4,699 | — | $1.60 |
| Weatherby | Select | 270 | Flat Nose | 2,800 | 4,699 | — | $2.00 |
| Hornady | DGX | 300 | DGX | 2,750 | 5,037 | — | — |
| Nosler | Trophy Grade | 300 | Partition | 2,750 | 5,037 | — | $0.85 |
| Barnes | VOR-TX | 300 | TTSX BT | 2,750 | 5,037 | — | $0.85 |
| Norma | Bondstrike/Oryx | 300 | Woodleigh Solid | 2,700 | 4,855 | — | $2.75 |
| Weatherby | Select | 300 | Flex Tip | 2,700 | 4,855 | — | $2.00 |
| Norma | Dedicated Hunter | 300 | Bonded Soft Point | 2,600 | 4,502 | — | $1.60 |
| Federal | Premium | 300 | Trophy Bonded | 2,530 | 4,263 | — | $0.85 |
| Weatherby | Select Plus | 300 | TSX | 2,530 | 4,263 | — | $2.50 |
Velocities are manufacturer-stated (test-barrel). Discontinued loads dimmed.
Dimensions
Reloading cost
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.
Connected reference
History
Roy Weatherby developed this belted magnum in 1944, the first of his magnum cartridges. Based on a blown-out .300 H&H case, it delivers .375 H&H-level performance at significantly higher velocity. Commercially introduced in 1945 and remains a Weatherby signature cartridge for the largest game.
FAQs
- What twist rate does .375 Weatherby Magnum use?
- .375 Weatherby Magnum typically uses a 1:12 twist rate.
- What bullet diameter is .375 Weatherby Magnum?
- .375 Weatherby Magnum uses a 0.375″ (9.53 mm) diameter bullet.
- Is .375 Weatherby Magnum still in production?
- .375 Weatherby Magnum is active; typical availability is specialty.
- What is .375 Weatherby Magnum used for?
- .375 Weatherby Magnum is primarily used for hunting.
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 15 live factory loads; the trajectory is modeled (point-mass), not measured. Spotted an error? Report it →