Hold that thought for a hot second – we’ll come back to it in a minute with some real-world examples.224 Valkyrie The muzzle velocity, usually in the 2,600 feet per second range, is moderate, so what makes the difference if the ability of the bullet to hold its speed farther down range. In English, that means that the bullets are longer and more “slippery” in the air, so they tend to get where they’re going faster. What makes the caliber tick for longer range applications is the high ballistic coefficient, especially when compared to the. The sweet spot seems to hover around 140-grains, give or take. 264 diameter bullets, most of which are in the 120 to 147-grain weight range. We did some long-range “science” using a pair of Palmetto State Armory rifles and a pile of 6.5mm Creedmoor and new. 308 and 6.5mm are similar, the curve is different, hence the benefit of bolt tweaking. Ideally, you’ll also want a tweaked high-pressure bolt with smaller firing pin and aperture. Its 2.825-inch overall length allows it to work just peachy in both short-action bolt guns, and as mentioned, the AR-10 platform with the appropriate barrel and chamber. 30 TC, which later begat the 6.5mm Creedmoor, so there is some loose resemblance between the standard. If you’re cool with em-biggening the rifle to an AR-10, then 6.5mm Creedmoor is a great option. If you want to extend your “standard” AR-15 platform into something that does a much better job at 1,000 yards than the. Keep in mind that this is not intended to be an apples to apples comparison with a result of one winning at the expense of the other. Let’s take a closer look at each and then get into some performance observations. 224 Valkyrie works just fine in a standard AR-15 lower receiver. The larger 6.5mm Creedmoor requires the larger AR-10 lower receiver for its longer magazine well while the. Both are optimized (or compatible if you like) with the AR platform. There are lots of great long-range cartridges out there, but I picked these two for a closer look for the same reason. 224 Valkyrie, on the other hand, is just a toddler, coming to market this year. Since then, it’s evolved to be a solid multi-purpose round for target, competition, hunting, and tactical applications. ![]() Developed by Hornady back in 2007, its original purpose was long-range target shooting. The 6.5mm Creedmoor cartridge had its tenth birthday last year, so it’s not a new kid on the block. Two of the hottest long-range cartridges for general purpose use (if there is such a thing) are 6.5mm Creedmoor and the brand new. This article originally appeared at Ammoland. ![]() Standard AR rifles are great for the zero to 600 yards range, but a couple of calibers really shine for reaching out to 1,000 and more.
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