ADG 338 RUM Brass – 50ct box

The ADG RUM brass 50ct box holds premium 338 Remington Ultra Magnum cases in a standard finish, optimized by ADG for both consistency and durability. The 338 RUM is a big, powerful magnum, and it demands brass that can take heavy charges and repeated firings without giving up. ADG strengthens this brass by optimizing the material in specific areas, which changes its case volume compared to other makers. For handloaders feeding a 338 Remington Ultra Mag, this premium brass is a foundation built to handle serious pressure.

What the ADG RUM Brass 50ct Box Offers and Who It Is For

This listing is for one box of 50 pieces of 338 Remington Ultra Mag brass, a reloading component rather than loaded ammunition. The 338 RUM is a beltless, high capacity magnum that drives heavy 338 bullets to impressive velocity, making it a favorite for large game and long range work. ADG manufactures this brass for consistency in performance and for durability, optimizing the material in specific areas to strengthen it against full pressure loads. Because that optimized geometry gives the brass a different case volume than most other makers, it responds to charge weight differently. Big bore hunters and long range shooters loading the 338 RUM are exactly who this brass serves.

The 338 Remington Ultra Magnum is a big, thirsty cartridge that drives heavy 338 bullets to serious velocity, and it asks a lot of its brass. ADG’s optimized, strengthened construction is built to take those pressures and keep delivering consistent performance through repeated firings.

As with all ADG brass, the different case volume means you should never simply transfer a load worked up with another maker’s cases. Reduce your starting charge, work up carefully from a reputable data source, and confirm your numbers over a chronograph.

For the big bore hunter who reloads, premium magnum brass is worth the extra care at the bench. Develop a safe load around it and this case will take the punishment of many firings.

Key Features of the ADG RUM Brass 50ct

• One 50 count box of 338 Remington Ultra Mag brass
• Standard finish optimized for consistency and durability
• Material optimized in specific areas to strengthen the case
• Different case volume than typical brass, tuned by ADG
• Built to withstand high capacity magnum pressures
• Ideal foundation for big game and long range 338 loads

Specifications Woven Into the Load

You get 50 pieces of 338 Remington Ultra Mag brass in a standard finish per box. Because the optimized material geometry gives this brass a different case volume than most other manufacturers, it will require a different charge weight to reach the same pressures and velocities. ADG recommends reducing any existing charge weights by 10 percent and re developing your specific load when you replace any component, including brass, projectile, primer, or powder. Failure to reduce charges established with other brass may drive higher pressures and velocities and could reach unsafe levels. Always work up from a reputable data source and verify your results over a chronograph.

Practical Use, Care, and Compatibility

Use this brass in a rifle chambered for 338 Remington Ultra Magnum, and pair it with heavy 338 caliber (.338 inch) bullets for big game or long range shooting. Treat load development as a fresh project, full length or neck size to your chamber, and keep your prep consistent. Store the cases in their box, dry and organized, so the premium brass stays clean through many firings. Round out a big bore reloading kit with 338 bullets, powder, and primers from the rest of our magnum reloading gear. This brass ships direct where state and local law allows.

For 338 RUM handloaders who want durable, consistent magnum brass, the ADG RUM brass 50ct box is a strong foundation. Ships direct to your door, no FFL required.