BrassAlpha MunitionsSold by Brownells

Alpha Munitions

6mm Gt Brass - 6mm Gt Srp Brass 100/Box

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Alpha Munitions

OCD Optimized Case Head Technology

6mm Gt

Cartridge design by George Gardner

35-degree Shoulder

Supports trouble-free feeding

Works Standard

Standard out-of-box 308 Win. AICS

Optimized Low

SDs and consistent performance in

$127.00
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SKU: 100043464

Overview

Built for precision rifle shooters who want a cartridge case designed around consistency and smooth magazine feeding, this brass is intended for 6mm GT applications in both bench work and practical competition. The design emphasizes low standard deviation and efficient case use, with a 35-degree shoulder and compatibility with standard out-of-box 308 Win. AICS or AW magazines. It is aimed at shooters loading around the 33–35 grain Varget range and working with 103–105 grain bullets, where repeatable performance matters more than general-purpose versatility. As with any specialized brass, it is best suited to dedicated precision setups rather than broad field use.

Why Hunters Choose the Alpha Munitions

6mm Gt

Cartridge use in precision rifle

35-degree Shoulder

Supports trouble-free feeding in detachable

Works Standard

Standard out-of-box .308 Win AICS

No Magazine

Inserts or modifications are required

Optimized Case

Dimensions target low SDs and

Key Features

  • Alpha Munitions 6mm GT brass with OCD Optimized Case Head Technology
  • 6mm GT cartridge design by George Gardner and Tom Jacobs
  • 35-degree shoulder supports trouble-free feeding
  • Works with standard out-of-box 308 Win. AICS or AW magazines
  • Optimized for low SDs and consistent performance in precision applications
  • Designed for near-100% case efficiency with 33–35 grains of Varget

Best Used For

  • Precision rifle shooters using 6mm GT in detachable magazine systems
  • PRS-style competitors seeking consistent cartridge dimensions and feeding
  • Reloaders working with standard out-of-box 308 Win AICS or AW magazines
  • Shooters loading 103–105 grain bullets for 6mm GT applications

Specifications

Bullet Weight Range103-105 grain bullets
Cartridge6mm GT
Case EfficiencyNearing 100% volume usage
Case Head TechnologyOCD Optimized Case Head Technology
Case TypeBrass
Designed ForBench and practical precision application (PRS style competitions)
Magazine CompatibilityStandard out-of-box 308 Win. AICS or AW magazines
Powder Charge Range33-35 grains of Varget
Primer TypeSRP
Quantity100/Box
Shoulder Angle35 degree
Velocity Range3020-3100 fps

Pros

  • Designed for 6mm GT cartridge use in precision rifle applications and PRS-style competition.
  • 35-degree shoulder supports trouble-free feeding in detachable magazine systems.
  • Works with standard out-of-box .308 Win AICS or AW magazines.
  • No magazine inserts or modifications are required for setup.
  • Optimized case dimensions target low SDs and consistent performance.
  • Case efficiency is described as nearing 100% volume usage with 33–35 grains of Varget.

Considerations & Trade-offs

  • Designed around 6mm GT chambering, so it is not a general-purpose brass option for other cartridges.
  • Performance notes in the description are tied to specific load ranges and bullet weights, so results will depend on your rifle and load development.
  • The cartridge is presented for precision and PRS-style use, which may be more specialized than what many hunters need for field rifles.
  • Use with standard 308 Win. AICS or AW magazines is noted, but the brass still requires a compatible 6mm GT setup.

Suggested Comparisons

  • 6mm precision rifle brass
  • PRS competition brass
  • Detachable magazine rifle cartridge brass
  • Precision reloading components

Suggested Accessories

  • Reloading dies
  • Case trimmer
  • Powder scale
  • Bullet comparator

Frequently Asked Questions

What is this brass intended for?

This is 6mm GT brass from Alpha Munitions, intended for the 6mm GT cartridge.

Does the 6mm GT work with standard magazines?

Yes. The description says it feeds with standard out-of-box 308 Win. AICS or AW magazines, with no magazine inserts or modifications required.

What case design feature is highlighted for feeding?

The 6mm GT features a 35 degree shoulder, described as supporting trouble-free feeding, especially with detachable magazine systems.

How much powder does the description reference for this cartridge?

The description notes optimal case efficiency nearing 100% volume usage at 33-35 grains of Varget.

What bullet weights and velocities are mentioned?

The description says it is capable of reaching 3020-3100 fps with 103-105 grain bullets, or approximately 3000 fps.