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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.
Remington even re-branded the cartridge name itself for a fresh start with a 100-grain factory load as the 6mm Remington. While the 6mm Remington cartridge never took over the .24 caliber dual purpose market lead from .243 Winchester, it was successfully sustained in production for nearly six decades. [11] As compared to the 1950s, there is ...
The 6mm BR to the left and 6mm Dasher in the middle are common benchrest cartridges, here compared to a .308 Winchester cartridge to the right. Only the most consistent and efficient cartridges can provide the necessary accuracy for benchrest shooting. Initially, many chamberings were tried, with the .219 Donaldson Wasp probably being the most ...
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Walker developed various cartridges while at Remington including .222 Remington, .244 Remington (later renamed 6mm Remington), and 6mm BR. [3] [4] [5] Walker also held patents, including one in 1950 for the trigger which went into the Remington Model 700. [6] That trigger has been associated with misfiring for which he proposed a solution. [6]
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 .308×1.5-inch 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 ...
Common calibers can be thought of as in the deer hunting, target shooting and bench rest range. .243 Winchester, 6mm Remington, 6mm BR, .260 Remington, 6.5mm Creedmoor, 6.5×55mm, 6.5x47, 6.5 TCU, .270 Winchester, 7mm-08 Remington, 7mm BR Remington, 7mm TCU, 7x57mm, .30 TC, .308 Winchester, and .30-06 Springfield. The limiting factor is the ...
The 6×45mm is a rimless, bottlenecked cartridge based on the .223 Remington or 5.56 NATO cartridge necked up to .243 (6mm). The cartridge is also known as the 6mm-223 Remington or 6mm/223 . History