Lindcott Armory Rifle · SAAMI standardized
.30-378 Weatherby Magnum
Weatherby's ultra-magnum overbore cartridge combining .30 caliber bullets with the .378 Weatherby case.
Identity
- Introduced
- 1996
- Type
- Rifle
- Origin
- United States
- Inventor
- Roy Weatherby
- Manufacturer
- Weatherby
- Standard
- SAAMI standardized
- Status
- Active
- Availability
- Specialty
Dimensions
- Bullet ⌀
- 0.308″
- Case capacity
- 131 gr H₂O
- Twist
- 1:10
- Primer
- Boxer Large Rifle
- Case type
- Belted
Performance
- Max pressure
- 63,817 psi
- Eff. range
- 400 yd
- Recoil
- 35–50 ft·lb
Ballistics
- Velocity
- 3,100–3,500 fps
- Energy
- 3,514–5,000 ft·lb
- Parent case
- —
Dimensions
Suitable powders
8 reloading powders listed for .30-378 Weatherby Magnum, fastest to slowest. Cross-reference in the finder →
Connected reference
History
Developed by Weatherby in the 1990s by necking a .378 Weatherby Magnum case down to .30 caliber. Produces extreme velocities exceeding 3,400 fps with 180-grain bullets. Commercially released in 1996. Known for extreme barrel erosion due to overbore capacity. Appeals to long-range hunters seeking maximum flat trajectory.
FAQs
- What twist rate does .30-378 Weatherby Magnum use?
- .30-378 Weatherby Magnum typically uses a 1:10 twist rate.
- What bullet diameter is .30-378 Weatherby Magnum?
- .30-378 Weatherby Magnum uses a 0.308″ (7.82 mm) diameter bullet.
- Is .30-378 Weatherby Magnum still in production?
- .30-378 Weatherby Magnum is active; typical availability is specialty.
- What is .30-378 Weatherby Magnum used for?
- .30-378 Weatherby Magnum is primarily used for hunting.
- What are the best powders for .30-378 Weatherby Magnum?
- Reloading powders commonly listed for .30-378 Weatherby Magnum include N570, 780, H1000, Retumbo, among 8 suitable options.