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ADG Brass (Atlas Development Group)

ADG Brass - 338 Rem Ultramag Anneal Line 50pc Box

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  • Close-up view of the base of a 338 Remington Ultra Magnum cartridge from ADG Brass, showcasing the headstamp and central primer hole. The headstamp includes the caliber designation '338 REM ULTRA MAG' with an anneal line visible, demonstrating the heat-treated durability of the brass. Perfect for detailed product listings in a 50-piece box set.
  • Bright orange ADG Brass hard plastic ammunition box for 338 Remington Ultra Magnum cartridges, prominently displaying the ADG logo and detailed product specifications on the label. The label includes the cartridge type and the quantity (50 pieces), tailored for ammunition collectors and retail presentations.
MSRP: $132.50
— You save $13.25

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Achieve Peak Performance with ADG’s 338 Rem Ultra Mag Brass

Introduction to ADG's Premium 338 Rem Ultra Mag Brass

Atlas Development Group (ADG) is at the forefront of innovation in ammunition technology, and our 338 Remington Ultra Magnum (Rem Ultra Mag) brass is a testament to this. Designed for exceptional performance and durability, this brass is tailored for the discerning shooter who demands the best.

Advanced Material Design for Enhanced Reliability

ADG's approach to brass manufacturing involves optimizing the material in specific areas to enhance strength. This method not only increases the lifespan of the brass but also ensures consistent performance across uses. Due to the optimized material geometry, our 338 Rem Ultra Mag brass has a different case volume compared to competitors’, necessitating adjustments in charge weights to achieve the same pressures and velocities.

Critical Load Adjustments for Optimal Safety

Transitioning to ADG brass or altering any component of your load recipe requires careful recalibration of your loads. We recommend reducing any existing charge weights by 10% and consulting a reputable load data source to start from their recommended minimum loads. These steps are crucial to avoid the risk of unsafe pressure levels and to maintain the integrity of your shooting experience.

Technical Specifications of ADG 338 Rem Ultra Mag Brass

  • Caliber: 338 Remington Ultra Magnum
  • Finish: Available in both Bright and Standard finishes
  • Quantity: Available in retail boxes of 50 pieces
  • Case Weight: 258.5 grains (average)
  • Case Volume: 110.5 grains of H2O (average)
  • Neck Wall Thickness: 0.0146 inches (average)

Benefits of Choosing ADG for Your Reloading Needs

Opting for ADG’s 338 Rem Ultra Mag brass means selecting a product crafted with precision and care. Our brass offers unmatched durability and performance consistency that professional shooters and enthusiasts can rely on. By following our loading recommendations, users can achieve superior performance safely and efficiently.


The Atlas Development Group's 338 Rem Ultra Mag brass stands out in the field of precision shooting for its meticulous design and reliability. Whether for competitive shooting or hunting, ADG brass provides the assurance of quality and performance that top shooters require. Trust ADG to elevate your reloading practice and enhance your shooting performance.

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Additional Information

.338 RUM
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