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The 6mm BR / 6.2x39mm is a centerfire cartridge created for benchrest shooting. The cartridge is also known as the 6mm Bench Rest or simply 6 BR, and has also developed a following among varmint hunters because of its efficiency. [5] There are two basic variants of very similar dimensions, known as the 6mm BR Remington and the 6mm Norma BR.
5 Parent cases for reloading non-standard calibers. 6 See also. 7 References. ... 6mm ARC – rifle; 6mm Dasher; 6mm AR (wildcat) 6×45mm – intermediate; 6.5mm ...
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The cartridge is a necked-up version of the .22 PPC which is in turn based on a .220 Russian (5.6×39mm). [5] The standard bullet diameter for 6 mm caliber cartridges is .243 inches (6.2 mm), the same diameter used in the .243 Winchester and 6mm Remington cartridges.
The 6XC is a 1000-yard cartridge, comparable to benchrest calibers such as 6x47mm Swiss Match, 6.5×47mm Lapua and 6 mm/22-250; it fits into cartridge class that exceeds the velocities of benchrest calibers such as 6mm BR Remington, 6mm BRX and 6mm Dasher. David Tubb has claimed several wins with the 6XC in NRA High Power National Championships ...
The 6mm Musgrave was a rifle cartridge invented by Ben Musgrave and introduced by Musgrave in 1969 [2] [3] The cartridge's design is based on necking down the .303 British , with the original intent of it being a Springbok caliber for hunting on open plains in South Africa's Karoo , Kalahari and Namakwaland .
However, Remington continues to manufacture several types of .260 Remington loads. The use of the .260 Remington by Sgt Sherri Gallagher to win the 2010 NRA High Power National Championship [ 4 ] has sparked a resurgence in the round, and Lapua announced at the 2011 SHOT show that it would be manufacturing .260 Remington brass.
The 6mm Remington has the advantage of a relatively low recoil of about 10 ft/lbs depending on load. Some gun writers, including Chuck Hawks of Guns and Shooting Online believe that this has the advantage of allowing shooters to be comfortable with the rifle without developing a flinch, allowing them to focus on accurate shot placement. [3] [4]