Description
Roy Weatherby made his name pairing blistering magnum cartridges with walnut nice enough to hang over the fireplace, and the Mark V Frontier picks that tradition right back up. The stock is exhibition grade walnut shaped in Italy with a matte oil-rubbed finish and hand-cut checkering, dressed up with a rosewood forend and grip cap set off by maple spacers. The Monte Carlo comb keeps your cheek weld consistent when the big 378 starts talking, and it does talk. This cartridge launches a 300 grain bullet at speeds that put it in a class most belted magnums never touch, with the energy to anchor the largest game on the planet.
What Makes the Mark V Frontier Different
Underneath the pretty wood is a working rifle. The Mark V action runs nine locking lugs with a 54 degree bolt lift, the shortest throw in the business, so you can cycle fast without banging your knuckles on a scope. The bolt is spiral fluted for smoother travel and wears an oversized, removable knob. Metalwork gets a Graphite Black Cerakote finish that shrugs off weather far better than traditional bluing, and the extended floorplate squeezes an extra round into the magazine for a 3+1 capacity with these fat cases. The adjustable TriggerTech trigger breaks clean with zero creep and can be tuned externally to your liking.
Built for the Field, Not Just the Safe
The 24 inch barrel comes threaded with Weatherby's Accubrake ST installed, which knocks felt recoil down by as much as 53 percent and keeps the muzzle settled for quick follow-ups. NECG iron sights, an adjustable express-style V rear and ramped front, give you a fast, rugged sighting option when a charge closes the distance in a hurry. A barrel band front swivel plus traditional stock studs cover your sling setup either way.
Weatherby Frontier 378 Wby Mag Accuracy Promise
Like every Mark V, this rifle carries Weatherby's sub-MOA guarantee: a three-shot group under an inch at 100 yards from a cold barrel with Weatherby factory or premium ammo. That is rare confidence in a dangerous game rifle, and it makes the Frontier as capable across a river valley as it is in thick brush.
Key Specifications
- Manufacturer: Weatherby
- Model: Mark V Frontier
- MPN: MFT01N378WR6B
- UPC: 747115460052
- Caliber: 378 Weatherby Magnum
- Action: Bolt Action, 9-Lug Mark V with 54 Degree Bolt Lift
- Barrel Length: 24" (plus 2" Accubrake ST)
- Muzzle Device: Threaded with Accubrake ST Installed
- Capacity: 3+1 with Extended Floorplate
- Stock: Exhibition Grade Walnut, Monte Carlo, Matte Oil-Rubbed Finish
- Stock Accents: Rosewood Forend and Grip Cap with Maple Spacers
- Metal Finish: Graphite Black Cerakote
- Sights: NECG Adjustable Rear and Ramped Front Iron Sights
- Trigger: TriggerTech, Externally Adjustable
- Overall Length: 44.25"
- Length of Pull: 13.5"
What’s Included
- Weatherby Mark V Frontier bolt action rifle
- Accubrake ST muzzle brake (factory installed)
- NECG iron sights (factory installed)
- Owner's manual
Frequently Asked Questions
How bad is the recoil on the Mark V Frontier in 378 Weatherby Magnum?
The 378 Wby Mag is a stout cartridge, no way around that, but this rifle is set up to manage it well. The factory-installed Accubrake ST cuts felt recoil by up to 53 percent, and the Monte Carlo stock directs recoil away from your face so you stay on target. Most folks find it very shootable off sticks or standing, which is how it will get used on big game anyway.
Is the Weatherby Mark V Frontier accurate enough for longer shots?
Yes. Every Mark V rifle carries Weatherby's guarantee of a three-shot group under one inch at 100 yards from a cold barrel with Weatherby factory or premium ammunition. Combined with the flat trajectory of the 378 Wby Mag, this rifle is comfortable well beyond typical dangerous game distances.
Can I mount a scope on the Mark V Frontier and still use the iron sights?
You can. The Mark V action's 54 degree bolt lift leaves plenty of clearance for low-mounted optics, and the NECG express-style rear and ramped front sights stay on the barrel as a rugged backup. That gives you a scoped setup for open country with fast irons ready if things get close and quick.
What game is the 378 Weatherby Magnum suited for?
The 378 Wby Mag was built for the biggest, toughest animals out there. It drives heavy 270 to 300 grain bullets at exceptional velocity, making it a proven choice for brown bear, Cape buffalo, eland, and other large or dangerous game. It is more cartridge than you need for deer-sized animals, but for a serious Alaska or Africa rifle it is right at home.





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