Weatherby Mark V Accumark .338-378 Wby Mag 26in
About this product
If you're shopping for a weatherby mark v accumark .338-378 wby mag 26in, you already know this rifle is built for serious reach and power. The Mark V Accumark is Weatherby's production-grade long-range hunter, combining their famous high-strength action with a fluted #3 contour barrel and an Accubrake muzzle device to tame the recoil of the .338-378 Weatherby Magnum cartridge. This right-hand rifle comes from the factory with a hand-laid Monte Carlo fiberglass stock, aluminum bedding blocks, and a Graphite Black Cerakote finish on all metal surfaces. It's a purpose-built tool for the shooter who needs consistent, repeatable accuracy at extended distances.
| Manufacturer | Weatherby (per manufacturer specs) |
|---|---|
| Model | Mark V Accumark .338-378 Wby Mag 26in |
| Material | Fluted #3 contour barrel, stainless steel with Cerakote finish; hand-laid fiberglass stock |
| Compatibility | .338-378 Weatherby Magnum cartridge |
| Finish | Graphite Black Cerakote on metal surfaces |
| Weight | Approximately 8.5 lbs (per manufacturer specs) |
| Condition | New Factory |
Key Features
- Fluted #3 Contour Barrel: Reduces weight while maintaining stiffness for consistent heat dissipation and accuracy shot after shot.
- Accubrake Muzzle Device: Cuts felt recoil by up to 53% (per Weatherby specs), letting you spot your hits and stay on target for follow-up shots.
- TriggerTech Field Trigger: A crisp, adjustable trigger with zero creep gives you a clean break for precise shot placement at long range.
- Hand-Laid Monte Carlo Fiberglass Stock: Lightweight and stable in any weather, with a raised comb for proper cheek weld when using optics.
- Aluminum Bedding Blocks: Glass-bedded action ensures the barreled action is locked in place, improving accuracy consistency over the life of the rifle.
Who It's For
This rifle is for the hunter who needs to reach out past 500 yards on elk, moose, or bear, and for the precision shooter who wants factory accuracy without a custom build. It's also a strong choice for the Weatherby enthusiast who appreciates the heritage and power of the .338-378 Wby Mag cartridge. New shooters should be aware this is a magnum cartridge with significant recoil and muzzle blast, even with the brake.
Pros & Cons
- Pros: Factory-accurate out of the box; effective muzzle brake reduces felt recoil; durable Cerakote finish; adjustable trigger for crisp break.
- Cons: The .338-378 Wby Mag ammunition is expensive and can be hard to find locally; the rifle is on the heavier side for backcountry hunting (around 8.5 lbs without optics).
Comparison
| Feature | Weatherby Mark V Accumark .338-378 | Timney Triggers (aftermarket) | Geissele (aftermarket triggers) |
|---|---|---|---|
| Purpose | Complete rifle system | Trigger upgrade only | Trigger upgrade only |
| Trigger Type | TriggerTech Field (factory) | Adjustable drop-in | Adjustable drop-in |
| Caliber | .338-378 Wby Mag | Universal (fits many actions) | Universal (fits many actions) |
| Price Point | ~$1,999 | ~$150–$250 | ~$200–$350 |
| Best For | Complete long-range hunting rifle | Trigger upgrade on existing rifle | Trigger upgrade on existing rifle |
What is the effective range of the Weatherby Mark V Accumark .338-378 Wby Mag 26in?
With proper optics and ammunition, this rifle is capable of accurate shots out to 1,000 yards or more. The .338-378 Wby Mag cartridge delivers high velocity and retained energy, making it effective for hunting large game at extended distances.Does this rifle come with a scope or optics?
No, the Weatherby Mark V Accumark is sold as a rifle only. You will need to mount your own scope and rings. The receiver is drilled and tapped for standard Weatherby bases.Is the Accubrake removable?
Yes, the Accubrake is threaded onto the barrel and can be removed if you prefer to shoot without it. Keep in mind that removing the brake will increase felt recoil significantly.What type of stock does the Accumark use?
It uses a hand-laid Monte Carlo fiberglass stock with aluminum bedding blocks. The stock is designed for a comfortable cheek weld and stable shooting from field positions.Can I use this rifle for target shooting or competition?
Absolutely. While it's marketed as a hunting rifle, the Accumark's accuracy and adjustable trigger make it suitable for long-range target shooting and some forms of precision competition, though the cartridge is overkill for most paper targets.Trust Block
- ✅ Nationwide delivery (all 50 states)
- ✅ Ships 1-2 business days
- ✅ 30-day returns
- ✅ Secure checkout
Last updated: April 2026
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