The .7mm BR Ammo, more commonly known as the .7mm BR Remington Ammo, was a cartridge developed to be used in the Remington XP-100, a single shot bolt-action handgun. The .7mm BR Ammo uses the design and blueprint of its predecessor .6mm BR Ammo as its parent case. The .6mm BR Ammo was merely necked up to accept a .28 Caliber Ammo. The .7mm BR Ammo carries enough energy to knock down metal targets at 200 yards seamlessly and has seen massive success in this particular shooting discipline. The 139-grain bullet variant of this cartridge can travel at a velocity of 2,200 feet per second. However, today, the .7mm BR Ammo is considered obsolete, and no manufacturer creates this ammunition, and no firearms are produced and chambered for it.
Mike Walker designed and developed the .7mm BR Ammo in 1978 in the United States. The production was ceased in 1998 since the bullet became obsolete.
In the ranges of 150 to 200 yards, the .7mm BR Ammo was a perfect choice for hunting deer species and any small to a medium-sized animal. However, this cartridge was most famous for Metallic Shooting back in the day.