The Weatherby Mark V Accumark 6.5-300WBY LH is a long-range precision tool built for left-handed shooters who refuse to compromise on velocity or accuracy. This factory offering from Weatherby delivers the blistering 6.5-300 Weatherby Magnum cartridge in a hand-laid fiberglass stock with full-length aluminum bedding, guaranteeing consistent sub-MOA performance out to 1,000 yards. With a 26-inch fluted barrel, adjustable trigger, and that iconic Mark V action, this is a competition-ready rifle that demands attention on the firing line.
| Manufacturer | Weatherby (per manufacturer specs) |
|---|---|
| Model | Mark V Accumark |
| Material | Hand-laid fiberglass stock with aluminum bedding block; 416 stainless steel barrel |
| Compatibility | 6.5-300 Weatherby Magnum cartridge; left-hand action |
| Finish | Matte bead-blasted stainless steel; black textured stock |
| Weight | 8.5 lbs (per manufacturer specs) |
| Condition | New |
Key Features
- Full-Length Aluminum Bedding Block: This rigid chassis system free-floats the barrel and locks the action into a consistent position—why it matters: eliminates point-of-impact shifts from stock flex or temperature changes, keeping your groups tight even during rapid fire stages.
- Fluted 26-Inch Barrel: The six-flute design reduces weight by nearly half a pound while increasing surface area for heat dissipation—why it matters: less barrel whip and faster cooling mean you can shoot longer strings without losing zero in a match.
- Adjustable Trigger (LXX Trigger): Factory-set at 2.5 pounds, but user-adjustable from 2 to 4 pounds via a simple hex screw—why it matters: dial in the exact break weight for your squeeze, reducing flinch and improving shot-to-shot consistency under pressure.
- Left-Hand Mark V Action: The 54-degree bolt lift and three gas ports on the bolt body provide smooth cycling and added safety—why it matters: left-handed shooters get a true mirror image of the right-hand design, not a Frankenstein build, so reloads are fast and natural.
- Accubrake ST Muzzle Brake: The radial-port design reduces felt recoil by up to 53% per Weatherby specs—why it matters: less recoil means faster follow-up shots and less fatigue during long range sessions or multi-day competitions.
Who It’s For
This rifle is built for the left-handed precision shooter who competes in PRS, F-Class, or ELR matches and demands factory accuracy without a custom build. It also suits hunters who need a flat-shooting magnum for open-country game like pronghorn or mule deer at extended ranges. If you’ve been fighting lefty availability and want a production rifle that shoots with custom-level consistency, this is your rig.
Pros and Cons
Pros: Sub-MOA guarantee out of the box; left-hand action is a genuine mirror design; Accubrake ST cuts recoil significantly; aluminum bedding block ensures repeatable accuracy; fluted barrel balances weight and cooling.
Cons: Ammo availability for 6.5-300 WBY is limited compared to 6.5 Creedmoor—you’ll likely need to reload or order online. The fiberglass stock, while stiff, lacks the adjustability of a full chassis system for cheek weld or LOP changes.
Comparison: Weatherby Mark V Accumark vs. Competitors
| Feature | Weatherby Mark V Accumark | Geissele Super Precision | Timney Calvin Elite |
|---|---|---|---|
| Action Type | Left-hand Mark V (54° bolt lift) | Right-hand only (custom action) | Remington 700 footprint |
| Barrel Length | 26″ fluted stainless | 22″ or 24″ (per build) | N/A (trigger only) |
| Stock Material | Fiberglass w/ aluminum bedding | Aluminum chassis | N/A |
| Weight | 8.5 lbs | 10+ lbs (chassis) | 0.25 lbs |
| Price | $2,199 | $3,500+ | $250 |
| Left-Hand Available | Yes | No | Yes (trigger) |
Note: Geissele and Timney are included as real competitors in precision rifle components, though Geissele offers complete rifles and Timney triggers. The Accumark provides a complete left-handed system at a lower price point than a custom Geissele build.
FAQ
What is the effective range of the 6.5-300 Weatherby Magnum?
With factory 140-grain loads, the 6.5-300 WBY pushes 3,300+ fps muzzle velocity, delivering supersonic energy past 1,500 yards. For practical competition use, it’s a proven performer at 1,000 yards and beyond, with minimal wind drift compared to 6.5 Creedmoor.
Is this rifle easy to maintain?
Yes—the 416 stainless barrel resists corrosion, and the fiberglass stock requires no bedding maintenance. Clean the bore with standard copper solvents after heavy shooting sessions, and check the action screws periodically. The Accubrake ST can be removed for cleaning with a standard wrench.
Does this model come with iron sights?
No, the Accumark is designed for optics-only use. It ships with a 20 MOA Picatinny rail pre-installed, ready for scope mounting. This is standard for precision rifles in this class.
What twist rate does the barrel have?
Per Weatherby specs, the 6.5-300 WBY Accumark uses a 1-in-8″ twist rate, optimized for bullets from 120 to 156 grains. This stabilizes long, high-BC projectiles like the Berger 156 gr EOL for extreme long-range accuracy.
Can I order this left-hand model directly?
Yes—this left-hand variant is in stock and ships from our warehouse. Left-hand production runs are limited, so availability can fluctuate. We recommend ordering now to secure your build slot.
This rifle is a serious investment in precision. With the 6.5-300 WBY’s flat trajectory and the Accumark’s bedding system, you’re getting a platform that competes with customs at half the price. Left-handed shooters finally have a factory option that doesn’t compromise.
Order the Weatherby Mark V Accumark 6.5-300WBY LH today.
✅ Nationwide delivery (all 50 states)
✅ Ships 1-2 business days
✅ 30-day returns
✅ Secure checkout
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Last updated: April 2026
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