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The 7mm BR Remington, commonly called the 7mm BR or the 7mm Benchrest Remington in long form, was a cartridge developed by Remington for the Remington model XP-100 single shot bolt action handgun. The cartridge was developed for the Unlimited Class in the sport of Metallic silhouette shooting. Later it was introduced in the Remington Model XB-40 single shot bolt action rifle specifically targeting the benchrest shooting community.[1]

The 7mm BR is based on previous Remington benchrest cartridges 6mm BR Remington and the .22 BR Remington cartridges. These cartridges in turn trace their origin to .308 Winchester via the .308x1.5 Barnes cartridge. The 7mm BR was designed by merely necking up the pre-existing 6mm BR Remington to accept a .28 caliber (7 mm) bullet. The cartridge is capable of developing 2,200 ft/s (Bad rounding hereScript error m/s) with a 139 gr (Bad rounding hereScript error g) bullet or 2,100 ft/s (Bad rounding hereScript error m/s) with a 154 gr (Bad rounding hereScript error g) bullet in a 15 in (Bad rounding hereScript error mm) barrel.[1]

As a hunting cartridge it is adequate for smaller deer species and ranges under 150 yd (Bad rounding hereScript error m). With lighter bullets, this cartridge makes an excellent varmint or predator cartridge. The 7mm BR Remington, however, was conceived as a competitive handgun cartridge for Metallic Shooting.[1] It has enough energy and momentum to knock down targets out to 200 yd (Bad rounding hereScript error m) and has had come success in that particular shooting discipline. Later it was also adopted in Benchrest shooting by Remington who introduced the X-40 rifle in that chambering.

At one time Remington produced ammunition and cases for this cartridge. They continued to supply the 7mm BR Remington case though to the early 1990s. Today the cartridge is considered obsolete and no one produces loaded ammunition and Remington no longer manufactures firearms chambered for this cartridge.

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