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Weatherby built the 338 WBY RPM for one reason: hunters wanted big bore performance without hauling a big bore rifle up the mountain. The cartridge was designed around the trim Mark V six lug action, which means you get serious energy for elk, moose, and bears in a package that carries like a lightweight deer gun. This Backcountry 2.0 pairs that cartridge with a 24 inch fluted barrel, giving the RPM extra room to stretch its legs velocity-wise compared to the shorter barreled versions.
The Peak 44 Blacktooth stock is one of the lightest production carbon fiber stocks you can get, weighing in around 19 ounces, and it wears a dark green and brown sponge pattern over exposed carbon that looks as good in camp as it does in the safe. The barreled action is sealed in Patriot Brown Cerakote with the bolt finished in Graphite Black, so wet weather and pack straps are not going to wear it down. The spiral fluted bolt runs smooth, the skeletonized aluminum bolt knob is easy to grab with gloves on, and the TriggerTech trigger breaks clean with no creep and barely any overtravel.
A hard kicking cartridge in a light rifle usually means a rough day at the bench, but Weatherby addressed that from two directions. The Accubrake ST uses 30 symmetrically spaced ports to bleed off a big chunk of felt recoil, and the 3DHEX recoil pad uses a 3D printed lattice that collapses progressively to spread the recoil impulse out over time. The result is a magnum that most folks find genuinely pleasant to shoot. Pull the brake off the 5/8×24 threads and it is ready for a suppressor too.
Like every Mark V, this rifle is backed by Weatherby's sub-MOA guarantee with factory or premium ammo, and the 1:10 twist handles the heavy .338 caliber bullets this cartridge was made for. The receiver comes drilled and tapped, so mounting glass is straightforward. Feed it from the 4+1 capacity, flip the thumb safety, and go hunt.
The 338 WBY RPM (Rebated Precision Magnum) was introduced by Weatherby in 2022 and designed specifically to fit the slim Mark V six lug action, so you get magnum-class energy in a much lighter rifle. It's an excellent choice for elk, moose, and big bears, and it's more than enough for deer-sized game. The cartridge is also efficient, so it doesn't give up much velocity even in shorter barrels, though this 24 inch version takes full advantage of it.
Less than you'd expect from a light magnum. The Accubrake ST cuts felt recoil substantially with its 30 ported design, and the 3DHEX recoil pad uses a collapsing 3D printed lattice that stretches the recoil impulse out so it feels like a push instead of a sharp jab. Plenty of owners compare it to shooting a standard short action cartridge. Just bring hearing protection, since brakes are loud.
Yes. The muzzle is threaded 5/8×24, so you can remove the Accubrake ST and run a suppressor directly. The 338 RPM's efficiency makes it a popular suppressor host since it doesn't lose much performance, though keep in mind adding a can changes the rifle's balance and point of impact, so confirm your zero after swapping.
It does. Every Weatherby Mark V is guaranteed to shoot a 3-shot group of .99 inches or better at 100 yards from a cold barrel using Weatherby factory or premium ammunition. The TriggerTech trigger with its zero-creep break makes it a lot easier to get the most out of that guarantee.
| UPC | 747115463367 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MBC20N338WR6B |
| Action | |
| Barrel Length | 24" |
| Caliber/Gauge | 338 WBY RPM |
| Capacity | 4 + 1 |
| Safety | Thumb |
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