This .300 Winchester Magnum rifle is long and heavy, but it doesn't buck the wind as well as the more compact .260 Remington. This shooter is engaging two small targets at close-range before transitioning to the long-range targets on a military course in Wyoming.
It's times like this when shooters wish for a lighter rifle, shooting ammunition that cuts through the wind better, drops less, and has less recoil. Sometimes going bigger isn't the answer; a larger magnum - like the .338 Lapua - might solve the ballistic problems, but at the expense of an even heavier rifle with more recoil.
Tactical shooters can be a dogmatic bunch, with some good reason. They have trained on a specific weapons system, shooting one kind of ammunition with one set of data, and they are comfortable with it. This can make arguing for a new bullet or cartridge a hard sell when the answer isn't 175-grain M118LR, the long-range accuracy loading of 7.62x51 NATO for sniper rifles.
Left to right: .260 Remington, .308 Winchester, 6.5-08 Ackley Improved, .300 Winchester Magnum, .338 Lapua Magnum. The Ackley version has a higher muzzle velocity than the .260, but it requires fire-forming brass and will give less barrel life.
The 6.5 mm bore size - the metric designation for .264 - has not been a big hit in the United States, since our legendary rifle cartridges are .30-06 and .270 Winchester. However, in Europe the 6.5 mm caliber has a long history, in large part due to the 6.5 mm Swedish Mauser cartridge. The 6.5x55 mm Swede is as popular in Europe as .270 is here, and it is regularly used to take large game including moose.