Explanation of the Popularity of the 6.5 Creedmoor
BY Herschel Smith1 year, 5 months ago
To appreciate the Creedmoor’s design details we must first look back to the mid-twentieth century. At a time when the Beatles were the hottest band in the land and the Bay of Pigs debacle was unfolding, American hunters and shooters were obsessed with belted magnum cartridges. The 7mm Remington Magnum, the .300 Winchester Magnum, and Roy Weatherby’s red-hot cartridges had become the standard for making long shots on big game. If you wanted to improve performance from your favorite belted magnum the answer was simple: shoot a lighter bullet.
Over the decades, serious shooters recognized two things. First, while lighter bullets did offer higher velocities and flatter trajectories at moderate ranges things changed when shots stretched much beyond a quarter-mile. Light bullets tended to drop very quickly when their velocities waned, and the wind shoved them all over the place. Second, hunters realized that powerful magnum rounds kicked hard, burned a lot of powder, and required long actions, magazines, and barrels which increased gun weight and overall length.
Fast magnums remained popular through the end of the twentieth century, and they are still popular choices for those who hunt big game at long distances. But by the turn of the century, shooters were taking a long, hard look at long-range bullet performance, and what they learned was that a bullet’s ballistic coefficient played an important role in downrange performance. Heavy-for-caliber bullets with aerodynamic profiles and high ballistic coefficients make sense for long-range shooting.
The sensible solution would be to load magnum ammunition with high-BC bullets, but there were two problems. First, many rifles had barrel twist rates that were too slow to properly stabilize extremely heavy-for-caliber bullets. Second, most cartridge cases were not designed with maximum-weight bullets in mind, so heavy bullets would rob case capacity or exceed acceptable cartridge overall lengths (COL).
Enter the 6.5 Creedmoor. It’s based on the .30 T/C, a cartridge that never garnered a major following. The Creedmoor was necked down and features a 30-degree shoulder and a long enough neck so that it can accommodate 140+ grain bullets without robbing case capacity, yet still fit in a short action. Muzzle velocities weren’t extremely high—around 2,700 fps with Hornady’s ELD match load—but that bullet boasts a G1 BC of .697, so at 500 yards it retains over 2,000 fps of velocity and almost 1,500 foot-pounds of energy. Compare that to Hornady’s .308 Win. 168 Boat Tail Hollow Point (BTHP) Match ammunition, and you’ll see why the Creedmoor makes sense. The .308 Win. load has a BC of .450 so it’s going to move more in a crosswind. The .308 Win., with its heavier bullet, is actually about 200 fps slower than the Creedmoor at 500 yards, and the .308 Win. produces more recoil.
That’s the best explanation of the 6.5 Creedmoor I’ve ever seen. Not even the engineers at Hornady have done so well at explaining why they developed the round.
It’s a heavy-for-caliber bullet, but not heavy. It’s long and has a high BC, but it fits in a short action rifle. It’s a long bullet but it doesn’t rob the case of powder capacity. It’s a compromise round. It achieves moderate to high MV at short ranges, but exceptional velocity at longer ranges.
Its recoil is of course more than say a 5.56mm, but it’s not like shooting a 30-06 or 7mm magnum. Guns designed for it send the round downrange with enough bullet twist to take advantage of the cartridge design.
There isn’t any such thing as perfect ammunition. Every decision is a compromise on something. But this round achieves the best of the compromises that have to be made, and is nearly as perfect as can be for white tail, hogs, varmint, and elk at close range. “When Emary and Thielen designed this round, they wanted a superb low-recoiling cartridge that was accurate and could take advantage of high-BC bullets, and that’s exactly what they’ve created.”
If you want something else, then get something else (e.g., use a 7mm magnum or 7mm PRC for ridge-to-ridge hunting in Idaho or Wyoming). Don’t criticize the 6.5 Creedmoor – its design has a purpose. Know what your bullet and gun are designed for, and stay within the boundary conditions of the analysis.