Weatherby Mark V

Lore & Background

Roy Weatherby had long relied on third-party actions, including FN Belgian Mauser, Schultz & Larsen, Mathieu left-handed, Brevex Magnum Mauser, and FN Sako Mauser actions. Dissatisfied with the time spent negotiating with European partners and the Mauser-type action's incomplete enclosure of the case head, he sought a design that could handle pressures up to 200,000 CUP. His requirements included a countersunk bolt face enclosing the cartridge case head, a counterbored barrel breech, vent holes in the bolt for gas redirection, and a shrouded bolt sleeve to protect the shooter. The Mark V action uses an interrupted screw breech with nine locking lugs in three rows, all flush with the bolt body for smooth cycling.

In spring 1955, Weatherby demonstrated the action at the NRA meetings in Washington, D.C., impressing Burt Munhall and General Julian Hatcher. Hatcher suggested John Garand for technical design, but Garand declined. Walter Howe recommended the Mathewson Tool Company, but their prototype lacked some features and was delayed. The first prototype rifle was built in 1957—the fifth design model—with assistance from engineer Fred Jennie. Elgin Gates suggested the name Mark V. Weatherby sought European suppliers: Steyr-Daimler-Puch's tooling costs were too high, Schultz & Larsen faced rising labor costs, Sako had a backlog, and BSA could not manufacture the nine-lug action. In 1957, Weatherby contracted Precision Foundry Inc. (PFI) of San Leandro, California, using investment casting, but high rejection rates and irregular deliveries led to a 1958 contract with J.P. Sauer & Sohn in Germany, which used forged receivers and hammer-forged barrels. In 1970, production moved to Howa in Japan for cost savings, and returned to the United States in 1994.

Reader's Guide

The Weatherby Mark V's significance lies in its role as the first action designed from the ground up to meet Roy Weatherby's safety and strength standards for high-pressure cartridges. Its nine-lug interrupted screw breech, fully enclosed bolt face, and gas-venting features set a benchmark for bolt-action safety, allowing it to be marketed as 'The World's Strongest Bolt Action' and tested to contain 200,000 CUP. The rifle's development involved multiple failed prototypes and a search for manufacturers across Europe and the United States, ultimately settling on J.P. Sauer & Sohn for forged actions and hammer-forged barrels, making Weatherby the first U.S. company to offer such barrels. Later production by Howa in Japan maintained strength and improved fit and finish, according to many observers. The Mark V's legacy includes its association with notable figures such as Prince Abdorreza Pahlavi, Generals James Doolittle and Chuck Yeager, and writers Jack O'Connor and Warren Page, which bolstered its reputation as a luxury firearm. It remains the flagship of Weatherby's line, representing the company's commitment to high-performance, safe bolt-action rifles.

Did You Know?

• The Mark V action uses nine locking lugs arranged in three rows, all flush with the bolt body.
• The rifle was tested to contain pressures up to 200,000 CUP.
• Roy Weatherby presented Mark V rifles to Prince Abdorreza Pahlavi, Generals James Doolittle and Chuck Yeager, and actors such as Lorne Greene.
• Production moved to the Howa factory in Japan in 1970 and returned to the United States in 1994.