Description
The Weatherby Mark V Deluxe (MDX01N378WR8B) is a bolt-action centerfire rifle chambered in .378 Wby Mag with a 26-inch high-gloss number 3 contour threaded barrel, a factory-installed AccuBrake ST, and a hand-finished AA walnut stock, built for dangerous game hunters and Weatherby collectors who demand the combination of legendary magnum performance and classic American craftsmanship in a production rifle. This is the flagship wood-stocked 378 Weatherby Magnum bolt-action rifle in the current Mark V lineup, offered for hunters who pursue the largest and most formidable game animals in the world.
Key Features
Part number: MDX01N378WR8B
Caliber: .378 Wby Mag
Capacity: 2+1 rounds
Barrel length: 26 inches, number 3 contour, high gloss
Barrel thread: 5/8-24 TPI
Total barrel and action OAL: 28 inches with AccuBrake ST
Twist rate: 1:12 inches, right-hand
Stock: Gloss AA walnut, Monte Carlo comb with cheekpiece
Checkering: Fineline diamond-point
Forend and grip cap: Rosewood with maplewood spacers
Pad: Pachmayr Decelerator
Length of pull: 13.5 inches
Overall length: 48.75 inches
Weight: 8.25 lbs
Sights: None
Bolt: Nine-lug, 54-degree bolt throw
Country of manufacture: USA
Special Features
The Mark V nine-lug bolt distributes chambering pressure across three rows of three lugs each, providing a locking surface area designed to handle the extreme pressures generated by the .378 Wby Mag cartridge across a service life measured in thousands of rounds.
The 54-degree bolt throw keeps the bolt handle travel short and the shooter’s hand close to the grip, allowing faster cycling between shots than standard 90-degree bolt designs on a rifle built for large game at extended range.
The factory AccuBrake ST is integrated into the 5/8-24 threaded muzzle at the time of manufacture, adding 2 inches to the total barrel OAL and directing propellant gases laterally to reduce muzzle movement and maintain target visibility through the scope after the shot.
The AA walnut stock features fineline diamond-point hand checkering on the grip and forend, rosewood tip and grip cap with contrasting maplewood spacers, and a Monte Carlo comb with cheekpiece that positions the shooter’s eye correctly behind a scope without requiring additional riser hardware.
The Pachmayr Decelerator recoil pad absorbs impact energy at the stock heel during the firing cycle, extending comfortable shooting sessions for hunters preparing for safari or running confirmation groups before a trip.
Practical Benefits
The .378 Wby Mag drives heavy-for-caliber bullets at velocities that maintain terminal performance at distances beyond what most standard dangerous game cartridges can sustain, giving hunters a flat-shooting option for both close-range work and extended field shots on large and dangerous species.
The 8.25 lb weight and Monte Carlo cheekpiece position the shooter precisely behind a large objective scope, which dangerous game hunters and long-range big game hunters carry for positive target identification at distance.
The threaded muzzle and pre-installed AccuBrake ST mean you can run the rifle as-delivered or remove the brake and install a suppressor or alternate muzzle device without additional machining.
Whether you are preparing for a once-in-a-lifetime dangerous game hunt or adding the crown jewel of your Weatherby collection, your Mark V Deluxe (MDX01N378WR8B) gives you a factory-accurate, hand-finished rifle chambered in one of the most powerful production cartridges ever built.
The Weatherby Mark V Deluxe (MDX01N378WR8B) in .378 Wby Mag is a proven platform and a confidence-building choice for the serious big game hunter or collector who wants a finely crafted American bolt rifle built around the most capable cartridge in the Weatherby Magnum family.
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