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Masterpiece Arms .308 Winchester — Field Tested Review

At Ally Munitions, we pride ourselves on producing, testing, and improving the products we sell. Part of that dedication is hands-on testing — not just in theory, but in actual rifles that are available on the market. That gives us a unique advantage: we’re not guessing how our ammo will perform in your rifle — we’ve likely already fired it in something just like it.

We test dozens of platforms, both custom and factory, and when we say something like “one of the most accurate rifles we’ve tested”, it should carry weight. The Masterpiece Arms (MPA) .308 Winchester is absolutely one of those rifles.

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Overview and Configuration

For a factory precision rifle on the upper end of the cost scale, the MPA .308 Win delivers serious performance. After a short break-in period, it’s shot nearly everything we’ve fed it with excellent consistency. This particular rifle has seen about 600 rounds, maintained under a strict cleaning schedule with no abuse or heat cycles.

We believe this rifle was designed to occupy a higher-tier price bracket in the PRS-style rifle world — and we can confirm, it earns its place.

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Rifle Specifications

• Barrel: 26", heavy contour, 1:10 twist

• Chamber: Match grade — tight, precise, likely contributes to consistent accuracy

• Chassis: MPA competition chassis

  • Full-length Arca rail integrated in the handguard

  • Enlarged vertical grip (customized post-purchase)

  • Band T monopod removed

• Trigger: Replaced with TriggerTech Diamond (2-stage, flat shoe)

• Weight: 18 lbs with optics and accessories

Accessories and Test Setup

• Optic: Leupold Mark 4HD 4.5-18x52

• Suppressor: Area 419 Maverick (short configuration, large brake installed)

• Bipod: MDT Double Pull

• Mounts: RPM 34mm rings

• Magazines: Factory with Warne +2 extension

• Action: 3-lug design with a short bolt throw, excellent mechanical feel

  • Toolless bolt breakdown

  • Smooth cycling, zero feed issues

Though this exact configuration is no longer available, current MPA models look even more refined — enough that we’re considering adding a few more to our test library.

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Accuracy and Group Testing

Before testing, the rifle was thoroughly cleaned and refouled with standard procedure. We focused on 168-grain factory match loads, then added our own Premier Series 168gr Berger VLD-H, which is technically a hunting load — but built to precision standards.

Test Details

• Distance: 100 yards

• Rounds per group: 5

• Cooling: Barrel allowed to return to ambient temp between groups

• Chronograph used for all velocity and SD data

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Results

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Final Thoughts

This rifle flat-out shoots. While we’ve swapped a few things from its original configuration — including trigger, grip, and optic — the core of this platform is what makes it so consistent. It’s a serious precision tool with a refined action, tight chamber, and solid fundamentals.

If the idea of a sub-half-MOA rifle with factory and premium ammo appeals to you, the Masterpiece Arms line deserves your attention. And even if it’s “just a .308,” we’re reminded again that caliber doesn’t limit precision — poor ammo or poor fit does.

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From the Range to the Bench — Why This Matters

This test wasn’t just for content. Every group fired and every load tested was funded by our own ammunition sales. We shoot what we sell, and we stand behind it.

Our Premier 168gr Berger VLD-H load didn’t just compete with factory match ammo — it beat it. That’s the kind of consistency we build into every box.

If you’re running a precision .308 and want to see what your rifle is truly capable of, give our Premier Series a try. We build it the way we test it — with full confidence and zero shortcuts.

Let us know how your rifle performs with our ammo, and stay tuned — we’ll be adding more MPA rifles to the lineup soon.