Winchester M70 ULT/SHDW 300WSM Package

I’ve been building firearms retail platforms for over a decade, and in that time, I’ve seen a lot of rifles come through our Boise warehouse. The ones that get my attention are the ones built on a foundation of solid engineering, with a clear purpose. The Winchester Model 70 is one of those foundational platforms—a controlled-round feed action that’s been trusted by hunters and shooters for generations. This specific package, the M70 ULT/SHDW in 300 Winchester Short Magnum, isn’t just another rifle on the shelf. It’s a purpose-built tool that takes that legendary action and wraps it in a modern, tactical-ready package designed for the shooter who understands that precision starts with a stable, repeatable platform. The 300 WSM chambering delivers magnum-level ballistics in a shorter, more efficient cartridge, making this a serious contender for long-range work where wind and distance are the primary adversaries.

Miamishooterssupply is a Boise, ID-based retailer specializing in firearms, optics, and gunsmithing tools for the serious enthusiast. The Winchester M70 ULT/SHDW 300WSM Package is a tactical bolt-action rifle built on the classic Model 70 controlled-round feed action. Its key differentiator is the factory-equipped MDT chassis system, providing an immediate upgrade in ergonomics and accessory compatibility over a traditional stock. This complete package is in stock and ready to ship today for $536.39.

What You’re Getting in This Winchester M70 Package

When you order this package, you’re bypassing the typical upgrade path. Most shooters buy a rifle, then immediately start looking for a better stock or chassis. Winchester and MDT have collaborated to solve that. You’re getting a complete, ready-to-mount-optics-and-shoot system. The heart is the Model 70 action, renowned for its robust claw extractor and three-position safety—a design favored by professional guides and hunters in demanding conditions for its reliability. It’s mounted in an MDT ESS chassis, which transforms the handling characteristics. You get an adjustable length of pull and comb height, a full-length M-LOK forend for lights, bipods, and grips, and a magazine system that accepts AICS-pattern magazines. The 24-inch heavy-contour barrel is threaded 5/8″-24, ready for a muzzle brake or suppressor. This isn’t a hunting rifle you’re trying to make tactical; it’s a tactical rifle from the ground up.

Key Features & Build Quality

The 300 Winchester Short Magnum is the engine here, and it’s a potent one. It essentially matches the ballistics of the standard .300 Win Mag but in a shorter, fatter case that promotes consistent powder burn and often yields excellent accuracy. Paired with the heavy, free-floated barrel, you have a platform capable of consistent sub-MOA groups with quality ammunition. The MDT ESS chassis is made from 6061 aluminum, providing a rigid bedding surface for the action that’s far more stable than any polymer or traditional wood stock. The rigidity is what improves shot-to-shot consistency.

From a gunsmith’s perspective, the fit of the action into the chassis is critical. The system uses a bedding block interface, which centers and supports the action evenly. The adjustable cheek piece and buttpad aren’t an afterthought; they’re essential for achieving a repeatable weld and proper eye alignment with a scope, which is non-negotiable for precision shooting. The included 5-round Magpul AICS magazine is a proven, reliable design. The overall finish is a matte black Cerakote, which provides superior corrosion resistance compared to bluing, especially for a rifle that might be used in varied field conditions or stored in a vehicle.

Pros and Cons: An Honest Assessment

✅ Pros:

• Factory Chassis System: The inclusion of the MDT ESS chassis represents significant value, saving you hundreds over buying a rifle and chassis separately.
• Controlled-Round Feed Action: The Model 70’s claw extractor provides positive cartridge control and reliable extraction under adverse conditions.
• Threaded Heavy Barrel: The 24″ heavy contour barrel minimizes harmonic vibration and is pre-threaded for muzzle devices, a must for managing 300 WSM recoil.
• Full M-LOK Compatibility: The forend offers extensive mounting points for modern accessories without the bulk of a Picatinny rail.
• Adjustable Ergonomics: The ability to tailor length of pull and cheek height is crucial for building a stable shooting position, whether prone or from a bench.
• Magnum Performance in a Short Action: The 300 WSM delivers long-range power without the need for a long action receiver, potentially allowing for a faster cycling bolt.

❌ Cons:

• Weight: This is not a lightweight mountain rifle. The chassis and heavy barrel make it a heavier package, best suited for supported shooting or deliberate carries. If you need a lighter hunting rig, see our traditional bolt-action rifles.
• Ammunition Cost & Recoil: 300 WSM is a magnum cartridge. Factory ammo is more expensive than .308 Winchester, and recoil is substantial, though the chassis and threaded barrel help mitigate it.
• Lacks Optics & Bipod: This is a rifle package, not a complete system. You must budget for a robust scope, rings, and a bipod to realize its potential.

Who This Rifle Is For (And Who Should Look Elsewhere)

Buy it if: You are a long-range shooting enthusiast looking for a capable, out-of-the-box rifle for target shooting or tactical-style competitions. You’re a handloader who wants to explore the accuracy potential of the 300 WSM cartridge. You’re a hunter in open country where shots may exceed 400 yards and you want a rifle that can double as a precision practice platform. You appreciate the mechanical reliability of the Model 70 action but want modern chassis ergonomics without a custom build.

Skip it if: Your primary use is stalking or hiking long distances where every ounce matters—this rifle’s weight is a disadvantage. You are a new shooter or recoil-sensitive; start with a milder cartridge like .308. Your budget is tight and doesn’t include several hundred more dollars for a quality optic, mount, and bipod. You want a classic-looking hunting rifle with a wood stock; this is a purely functional, modern tactical tool.

Technical Specifications

How It Stacks Up: Value Comparison

Feature	Winchester M70 ULT/SHDW 300WSM Package	Budget “Tactical” Rifle (e.g., Import Sporter)	Premium Custom Chassis Rifle
Material (Chassis)	6061 Aluminum MDT ESS Chassis	Polymer Stock or Basic Aluminum Bedding Block	Precision-Machined 7075 Aluminum Chassis
Quality (Action)	Proven Winchester M70 CRF Action	Generic Push-Feed Action	Custom Blueprinted Action (Rem 700, etc.)
Compatibility	AICS Mags, M-LOK Forend, Adjustable	Proprietary Mags, Limited Rail Space	AICS Mags, Full ARCA/M-LOK, Highly Adjustable
Shipping	Ready to Ship, Complete Package	Ready to Ship, Needs Upgrades	Long Lead Time (6+ months)
Lifespan/Durability	High (Commercial & Professional Use)	Medium (Hobbyist Use)	Very High (Competition Use)
Price Point	$536.39 (Our Price)	~$60-80 for aftermarket stock only	$2500+ (rifle + chassis + gunsmithing)

This comparison shows the clear value proposition. You’re getting a reputable factory action in a quality, feature-rich chassis at a price point that sits between a basic rifle needing immediate upgrades and a full custom build with a long wait time.

Frequently Asked Questions