WEATHERBY MDX01N378WR8B MARK V DELUXE 378 WBY MAG 26" BBL

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.