.300 Rem. Ultra Mag Review: Pros and cons of the .300 Rem. Ultra Mag

The .300 Remington Ultra Magnum, commonly known as the .300 RUM, is a powerful rifle cartridge introduced by Remington Arms in 1999. The cartridge is based on a shortened and necked down .404 Jeffery case, and it is designed to provide long-range performance with relatively flat trajectories and high energy transfer at extended ranges. In this blog, we will discuss the pros and cons of the .300 RUM.


  1. High Velocity and Flat Trajectory: The .300 RUM can achieve high velocities and flat trajectories due to its large case capacity and high-pressure loadings. This makes it an excellent choice for long-range shooting, where accuracy and energy transfer are critical.

  2. High Energy Transfer: The .300 RUM delivers significant energy transfer to the target due to its high velocity and large bullet weight. This makes it an ideal choice for big game hunting, including elk, moose, and grizzly bears.

  3. Versatile: The .300 RUM can be used for a variety of shooting applications, including long-range target shooting, varmint hunting, and big game hunting. Its versatility makes it a popular choice for hunters and shooters who require a cartridge that can perform in multiple situations.

  4. Availability of Ammunition: The .300 RUM is a popular cartridge, and ammunition is widely available at most gun stores and online retailers. This makes it convenient for shooters who do not hand-load their own ammunition.


  1. Recoil: The .300 RUM generates significant recoil, which can be uncomfortable for some shooters, particularly when firing heavy bullet weights or shooting from a lightweight rifle. This can impact accuracy and follow-up shots.

  2. Barrel Life: The .300 RUM has a reputation for short barrel life due to its high-pressure loadings and large case capacity. This means that shooters may need to replace their barrels more frequently than with other cartridges.

  3. Cost: The .300 RUM is an expensive cartridge to shoot, primarily due to the high cost of ammunition and reloading components. This can be a barrier to entry for some shooters who are on a tight budget.

  4. Overkill for Smaller Game: The .300 RUM is a powerful cartridge, and it may be overkill for smaller game, such as deer or antelope, at close ranges. This can result in excessive meat damage, which can be wasteful.

The .300 Remington Ultra Magnum is a powerful and versatile cartridge that offers high velocities, flat trajectories, and significant energy transfer. It is a popular choice for long-range shooting and big game hunting, but it has some drawbacks, including significant recoil, short barrel life, and high cost. Shooters who are comfortable with recoil and require a versatile cartridge for a range of shooting applications will find the .300 RUM to be an excellent choice.

Order a rifle sling customized for your .300 Rem. Ultra Mag rifle today.

 .300 Rem. Ultra Mag Review: Pros and cons of the .300 Rem. Ultra Mag