The Weatherby Mark V Deluxe is a bolt-action rifle chambered in .338-378 Weatherby Magnum, fitted with a gloss walnut stock and blued receiver. The walnut is shaped with a Monte Carlo comb and fitted with a Pachmayr Decelerator recoil pad — practical choices for a cartridge with this level of recoil. The barrel is drilled and tapped, so optics go on without adapters. 
 

Key Specifications 

• Model: Mark V Deluxe 
• Caliber: .338-378 Weatherby Mag 
• Action Type: Bolt Action 
• Barrel Length: 26 inches 
• Capacity: 2+1 rounds 
• Overall Length: 48.75 inches 
• Weight: 8.25 lbs 
• Finish Per Color: Gloss Walnut Stock with Blued Receiver 
• Recoil Pad Type: Pachmayr Decelerator 
• Sights: Drilled & Tapped for customization 
• Twist Rate: 1:10" 
   

Detailed Features 

 
The Accubrake muzzle device reduces felt recoil noticeably — worth having on a .338-378. The 1:10" twist rate is matched to the heavy .338-caliber bullets this cartridge typically runs. At 26 inches, the barrel extracts most of the velocity the cartridge offers while keeping the rifle at 48.75 inches overall.

Users tend to split their comments between performance and the physical demands of shooting it.

On the positive side, build quality comes up consistently — the fit between stock and metal, the finish, and the overall feel of the action draw praise. Accuracy at long range is another common point, with owners reporting tight groups that hold up well at distance. The .338-378 Weatherby Magnum cartridge itself gets credit for its flat trajectory and stopping power on large game.

The flip side is recoil. The .338-378 generates substantial felt recoil even with the Pachmayr pad, and that comes up in most discussions. Weight is the other recurring note at 8.25 lbs — manageable at the bench but noticeable on a long pack-in hunt. Price is a factor for some buyers comparing it to other magnum bolt guns at similar price points, though most concede the build quality is consistent with what Weatherby charges.

The overall picture is a rifle that does what it promises in the field, with the trade-offs you'd expect from a hard-hitting long-range cartridge in a traditional wood-and-blued-steel package.