Weatherby continues to lead the industry in cartridge innovation with the introduction of the 25 WBY RPM (Rebated Precision Magnum) the newest addition to the RPM family. Designed to deliver true magnum performance from lightweight, compact rifles, the 25 RPM reinforces Weatherby's position at the top of the mountain for quarter-bore cartridges.
Weatherby has always been known for pushing velocity, energy, and ballistic efficiency beyond what shooters expect. With the 25 RPM, that legacy continues. Built on the same proven design philosophy as the 6.5 RPM and 338 RPM, the 25 RPM is engineered specifically for the Mark V 6 lug action, delivering exceptional performance without the weight and length of a traditional magnum platform.
At the heart of the 25 RPM is a modern case design featuring a rebated rim, minimal body taper, and a 35-degree shoulder. This geometry increases usable case capacity while improving efficiency and consistency. By slightly shortening and refining the proven RPM case design, Weatherby optimized overall cartridge length to support today's heavy for caliber, high BC bullets without compromise.
The result is a cartridge that thrives with fast twist rates (1:7.5) and long, sleek projectiles. The 25 RPM is capable of pushing a 133 gr Berger at 3,000 feet per second, delivering flatter trajectories, higher retained energy, and superior downrange performance compared to legacy quarter-bore cartridges. When compared to popular alternatives like the 25 Creedmoor, 25-06, and 257 Roberts, the 25 RPM offers a clear ballistic advantage.
"It's been 80 years since my grandfather introduced his favorite cartridge, the 257 Wby Mag. Rather than updating the all-time "King of the Quarter Bore", we felt it was fitting to introduce the 25 WBY RPM alongside Roy's favorite cartridge with the purposeful intent of loading heavy for caliber bullets that are now so readily available. The end result will be an unstoppable pair of 25's!" -Adam Weatherby, CEO Weatherby Inc
Versatility is another defining feature of the 25 RPM. While it excels with heavy, high BC bullets for long-range hunting, it is equally capable of spinning lighter projectiles at speeds exceeding 3300 feet per second. This balance makes the 25 RPM an ideal choice for hunters seeking a do-it-all quarter-bore cartridge that performs across a wide range of game.
At launch, factory ammunition will be offered in multiple configurations, including a 133 gr Berger, 117 gr Barnes LRX, 117 gr Hornady SST, and 107 gr Tipped Hammer HCB. Brass will be available for reloaders.
See Ballistics Here
The 25 RPM will be available in both Weatherby Mark V and Model 307 rifles, making it one of the most accessible new cartridge launches in company history. With rifle options starting at an approachable price point, shooters can experience cutting-edge cartridge performance without compromise.
Available Mark V Models
-Backcountry Guide
-Bakccountry Guide Ti
-Backcountry 2.0
-Backcountry 2.0 Ti
-Mark V Deluxe
-Apex
-Accumark
-Live Wild
-Live Wild Carbon
Available 307 Models
-Alpine CT
-Alpine ST
-Alpine MDT Carbon
-Alpine MDT
-Adventure SD
-Range XP 2.0
-Range SF
-Hush Edition
Learn more Here
About Weatherby
Founded in 1945, Weatherby, Inc. is a family-owned company that continues to fuel the passion of hunters and shooters around the globe by building some of the world's finest firearms. With a legacy of setting new standards in ballistics and performance, the company is committed to redefining excellence on the range and in the field. The Weatherby line features the Model 307, legendary Mark V rifles, accessible and popular Vanguard® rifles as well as shotguns like the SORIX, Orion®, Element®, and 18i®. Weatherby's premium ammunition and shooting accessories are also the choice for discerning shooters worldwide. The company is based in Sheridan, WY, and invites all hunters and shooters to follow them on social media at @weatherbyinc on Facebook and Instagram. For more information about Weatherby, please visit weatherby.com.