.300 Remington Ultra Magnum (RUM) Ammo

The .300 Remington Ultra Magnum (RUM) ammunition category is designed for shooters and hunters who demand extreme performance from their rifles. Introduced by Remington in 1999, the .300 RUM is part of the Ultra Magnum series, known for achieving some of the highest velocities in commercially available ammunition. This selection features premium ammunition from leading manufacturers, ideal for those seeking maximum reach and devastating terminal performance in long-range hunting and precision shooting.

Intended Use: The .300 Remington Ultra Magnum is excellently suited for long-range big game hunting, capable of taking down large and dangerous game such as elk, moose, and bear at extended distances. Its high ballistic performance also makes it a popular choice among sport shooters for hitting targets at extreme ranges, where energy and precision are critical.

Caliber/Size: The .300 RUM launches a .30 caliber bullet, but with significantly more powder behind it than most other .30 caliber magnum cartridges. This enables it to fire heavy projectiles at speeds that enhance both flat trajectories and high downrange impact, maximizing its effectiveness over long distances.

Performance Characteristics: Known for its high velocity and exceptional stopping power, the .300 RUM delivers a flat shooting experience with less wind drift and greater energy retention at extreme ranges compared to many other cartridges. This makes it particularly effective for precise long-range shooting where terminal performance is essential.

Material and Construction: .300 RUM rounds are made with the highest quality components, featuring robust brass casings and a selection of high-performance bullet designs. These include controlled-expansion bullets for hunting, ensuring deep penetration and maximum damage on impact, and match-grade bullets for competitive shooting, offering unparalleled accuracy.

Brands and Manufacturers: This category includes ammunition from industry leaders such as Remington, the cartridge’s originator, along with other premium brands like Nosler and Hornady. These manufacturers commit to producing advanced .300 RUM options that meet the rigorous demands of the most serious hunters and precision shooters.

A Brief History: The .300 Remington Ultra Magnum was developed as part of Remington’s quest to create a line of cartridges that could outperform existing magnums on the market. It has quickly established itself as a benchmark for high-performance long-range cartridges, admired for its capabilities in both hunting and sport shooting arenas.


  1. What is the effective range of a .300 Remington Ultra Magnum? The .300 RUM is effective at ranges exceeding 1,000 yards for hunting, with sufficient power and accuracy to engage targets even further in sport shooting contexts.
  2. Can the .300 Remington Ultra Magnum be used for smaller game? While it can technically be used for smaller game, the .300 RUM’s powerful performance and high energy transfer make it more suitable for larger animals, as it may cause excessive damage to smaller game.
  3. How does the .300 Remington Ultra Magnum compare to other ultra-long-range cartridges? The .300 RUM stands out for its extreme velocity and energy, surpassing many other ultra-long-range cartridges in terms of performance. It competes directly with other high-caliber rounds like the .338 Lapua Magnum, offering a different balance of recoil, trajectory, and terminal ballistics.

Showing all 10 results