The 7mm Remington Ultra Magnum or 7mm RUM is a 7mm rifle cartridge introduced by Remington Arms in 2001. The 7mm RUM was created using the .404 Jeffery case [citation needed] which was also used to develop the .375 RUM .300 RUM, and …

The 7mm RUM is based on the .300 Remington Ultra Magnum (1999) which is in turn based on a grossly modified version of the unbelted 404 Jeffery’s case. The RUM was designed to produce ultra high velocities to meet the growing demand for long range hunting rifles and cartridges.

The 7mm Remington Ultra Mag is the smallest of the Ultra Mag calibers. It offers ballistics roughly comparable to the 7mm STW, but burns more powder to do so. Because of its great case capacity it is overbore with all but the very slowest rifle powders.

2019年11月2日 · It is simply the .300 RUM necked down from .308-inch to .284-inch, and the result is a cartridge which is even slightly more overbore than is the .300 RUM. The 7mm RUM drives a 150-grain bullet to 3150 fps, or about 100 fps faster than the 7mm Remington Magnum.

2019年11月26日 · Let’s compare three cartridges that do that; the old 7mm Rem. Mag., the new .28 Nosler, and the over-the-top 7mm RUM. .284 bullets to fit the bores of all 7mm cartridges come in a wide variety of shapes and weights from 100 grains to 180 grains—adequate for everything from coyotes to big bears.

7mm RUM. The 7mm RUM arrived in 2001. It promised a new era for long-range hunters and competition shooters. Imagine sleek .284 caliber bullets launched at 200 or even 300 feet per second faster than the world’s most popular 7mm, the 7mm Remington Magnum (just plain "Magnum," thank you—no "Ultra"). How could any shooter turn such a recipe down?

The ballistic performances based off three grain types for the 7mm Remington Ultra Magnum on a 26 inch test barrel for muzzle velocity are 3,425 ft/s (140 gr), 3,325 ft/s (150 gr), and 3,025 ft/s (175 gr).

2023年9月18日 · The 7mm RUM performed very well. It led the pack with 140-, 160-, and 175-grain bullets, showing a roughly 150 fps advantage over the 7mm STW and 200 to 250 fps over the 7mm Rem. Mag. Its closest challenger was the 28 Nosler, which drove a 175-grain bullet within 30 fps of the RUM with less propellant.

2023年4月8日 · Both the 7mm RUM and the 7mm Rem Mag are powerful and accurate cartridges with unique features. The 7mm RUM is ideal for long-range hunting and precision shooting, offering higher velocity and flatter trajectory.

The 7mm Ultra Mag delivers hard-hitting long-range performance, perfect for hunting large North American big game like bears, elk, and moose. A 7mm Mag is already a powerful cartridge, but the 7mm Rem Ultra Mag delivers up to 25% more performance.