$95.99
1 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
When Weatherby set out to build a 338 magnum that actually weighs less than a conventional rifle, they engineered the 338 WBY RPM from the ground up. Instead of cramming a big bore into a traditional magnum action, they designed this cartridge to work in their compact Mark V 6-lug action, delivering genuine magnum ballistics without the bulk.
The 225-grain Barnes TTSX bullet is the perfect match for what this cartridge does. You get a 100-percent copper projectile that expands reliably across a wide velocity range, combines deep penetration with excellent weight retention, and shoots flat enough for hunting situations beyond close range. The polymer tip improves the ballistic coefficient and triggers faster expansion on contact. That combination of clean, reliable performance is why hunters have trusted this bullet design for years.
The 338 WBY RPM uses a non-belted case with a rebated rim and steep 35-degree shoulder necked up from the 6.5 RPM parent design. That clever engineering gives you increased case capacity in a package that still fits standard-length rifle actions. The result is roughly 2800 fps from the factory load with the 225-grain bullet, producing enough energy to handle everything North America throws at you, from elk in tight timber to moose and brown bear in open country. Field testing by Weatherby's team showed the cartridge performing at distances ranging from close work all the way out past 500 yards.
The four razor-sharp cutting petals on the Barnes bullet expand to nearly double the original diameter, creating massive wound channels and transferring energy consistently. Because it's all copper instead of lead-core construction, it resists deformation during the expansion process, which means you get through-and-through penetration on angled shots where precision matters most. Recoil on even 5-pound rifles stays manageable when the rifle is set up properly, making follow-up shots achievable.
This is Weatherby Select Plus ammo loaded to factory specifications in reloadable brass. Twenty rounds per box.
This ammunition is chambered for rifles built for the .338 WBY RPM cartridge, which is available in Weatherby's Mark V Backcountry series and other manufacturers who chamber this cartridge. The cartridge was introduced by Weatherby in 2022 and works in their 6-lug action platform. Always verify your rifle's exact chambering before firing any ammunition.
The 225-grain Barnes TTSX is designed for deep penetration with controlled expansion. It's a 100-percent copper bullet that retains nearly all its weight, making it effective on large game at various ranges. The polymer tip improves long-range ballistics while promoting reliable expansion. This weight and design work well for elk, moose, and bear hunting.
The .338 WBY RPM delivers solid performance for extended-range hunting. The 225-grain load with a .514 ballistic coefficient maintains energy and velocity out to 300+ yards. Weatherby's field testing showed effective performance at distances past 500 yards, making it suitable for situations where longer shots may occur, provided you're comfortable with the cartridge's trajectory at your intended distance.
Yes. Weatherby Select Plus ammunition comes in reloadable brass casings, which is common for handloaders. However, this is factory-loaded ammunition ready to fire as-is. If you plan to reload, keep the fired cases and follow proper reloading data for the .338 WBY RPM cartridge.
| UPC | 747115450671 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B338225TTSX |
| Shipping Weight | 1.605 |
You must be logged in to post a review.
Reviews
There are no reviews yet.