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.300 RUM (Remington Ultra Mag) Rifle Brass

300 Rem Ultra Mag Rifle Brass


.300 RUM Rifle Brass

  • Remington-Peters (RP) and Barnes Headstamps
  • Unprocessed
  • Washed and Polished
  • 100% Brass Casings
  • 25 Casings
Our Price: $50.00

Quantity in Stock:Out of Stock
Availability:: Usually Ships in 2 to 3 Business Days
Product Code: SP300RUMRP-Q0025

The .300 RUM, which stands for Remington Ultra Magnum, was first introduced by Remington Arms in 1999. Also known as the .300 Ultra Mag, the .300 RUM has become one of the largest commercially available .30 caliber magnums currently being produced. It features abeltless, rebated rim cartridge and is extremely capable of handling all large game animals in North America, and works exceptionally well for long-range shots.

In the early 1980s Aubrey White and Noburo Uno of North American Shooting Systems (NASS) based in British Columbia Canada began experimenting with the full length .404 Jeffery by reducing the taper and necking it down to various calibers such as 7 mm, .308, 311, 338, 9.3 mm and .375. These cartridges were known variously as the Canadian Magnum or the Imperial Magnums. Rifles were built on Remington Model 700 Long Actions and used McMillan stocks. Cartridges were fire formed from .404 Jeffery cases with the rim turned down, taper reduced and featured sharp shoulders. Both Remington and Dakota Arms purchased the formed brass designed by Noburo Uno for use in their own experimentation and cartridge development. In 1999 Remington released the first of a series of cartridges virtually identical to the Canadian Magnum cartridges which featured a slightly wider body, increased taper, and shallower shoulders and named it the .300 Remington Ultra Magnum. Dakota too released their own version of the cartridge, but chose not to turn down the rim and shortened the case to work in a standard-length action.

Each box contains 25 once fired brass shell casings. Remington-Peters (RP) and Barnes headstamps. This is unprocessed brass sourced from commercial shooting ranges. The casings have been washed and polished, but not resized and may still contain the spent primer. It is recommended that all brass be inspected prior to being reloaded and fired.

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