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6.5 mm Creedmoor

Hornady describes their 6.5 Creedmoor:

Hornady’s new 6.5 Creedmoor is as pedigreed as it is precise. Developed by Dave Emary,
Hornady’s Senior Ballistic Scientist and Dennis DeMille, General Manager of
Creedmoor® Sports and two-time NRA National High Power Rifle Champion, this
cartridge has more pedigree than any other match cartridge on the market.
The 6.5 Creedmoor was designed to allow any shooter to compete at the highest level with
factory-loaded ammunition. Built for match rifles, including the Tubb 2000 and DPMS.
Its case is slightly shorter than the 260 Remington, eliminating any “Cartridge
Overall Length” issues when using 308 Winchester length magazines.

Hornady introduced the 6.5 mm Creedmoor cartridge in 2007. The superior ballistic coefficient and the increase in popularity of the 6.5mm  bullet prompted Hornady to develop the 6.5 Creedmoor cartridge.  Laapua’s 6.5x47 aand Remington’s .260 cartridge provide competition in this category of cartridge.  Based on a .308 Winchester sized case the 6.5 Creedmoor lands in between the larger .260 Remington and the slightly smaller 6.5x47 Lapua.  Hornady says the 6.5 Creedmoor operates at .308 Winchester case pressures, which SAAMI rates at 2,000 psi.  However, the factory 6.5 Creedmoor loads come in at slightly less than 60,000 PSI.  The 6.5x47 Lapua operates at 63,900PSI.  the lower pressures should increase barrel life of rifles chambered in the 6.5 Creedmoor.

The Hornady literature describes the 6.5 Creedmoor cartridge design:

A sharper 30O shoulder and aggressive body taper allow the
6.5 Creedmoor to deliver higher velocities than other 6mm
and 6.5mm cartridges. Speed helps in long-range match
shooting, and the 6.5 Creedmoor operates at standard 308
Winchester pressures, thus increasing barrel and case life.
Wind and gravity have less effect on fast bullets because
they spend less time in the air. Slower cartridges experience
more drop and wind drift, making it harder to predict
performance on target. The 6.5 Creedmoor is the ultimate
match cartridge.

When loaded with heavier bullets, longer case capacity rounds such as the 6.5x55 Swedish and 6.5-284 are capable of greater velocity. However, due to its shorter overall length, the 6.5 Creedmoor has a slight advantage over these longer rounds in that it can be chambered in a shorter length bolt action or the newer AR-10 rifle.

6.5 mm (.264") bullets, in general, are known for their relatively high ballistic coefficients, and have seen success in rifle competition. The 6.5 Creedmoor proves capable of duplicating the trajectory of the .300 Winchester Magnum while generating significantly lower recoil. Also, converting a rifle chambered for the .308 Winchester (or any of its offspring, such as the .243 Winchester, 7mm-08 Remington or .338 Federal) to 6.5 Creedmoor generally requires little more than a simple barrel change.

6.5 mm Creedmoor
Type                                                                    Rifle
Place of origin                                                United States

Production History

Designed                                                          2007
Manufacturer                                                Hornady
Produced                                                         2008

Specifications

Bullet diameter                                            .2645 in (6.72 mm)
Neck diameter                                              .2969 in (7.54 mm)
Shoulder diameter                                     .459 in (11.7 mm)
Base diameter                                              .470 in (11.9 mm)
Rim diameter                                               .4728 in (12.01 mm)
Rim thickness                                               .0539 in (1.37 mm)
Case length                                                    1.920 in (48.8 mm)
Overall length                                               2.820 in (71.6 mm)
Primer type                                                   Large rifle

Ballistic Performance

Bullet weight/type                           Velocity(MV)                          Energy(ME)
120 gr (7.8 g) AMAX                                    3,050 fps (930 mps)                        2,478 ft·lbf (3,360 J)
140 gr (9.1 g) AMAX                                    2,820 fps (860 mps)                        2,472 ft·lbf (3,352 J)

Source: Hornady Manufacturing Company

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I recently ordered a couple of new guns from my local gun shop. It may be a while until they come in, from what I am told. I ordered a 3 inch Ruger SP101 in the new .327 Federal Magnum caliber and a Ruger Hawkeye African in the .375 Ruger caliber. The seller tells me that the SP 101 in that make up is just now trickling out of the factory and that distributers are having a hard time stocking them for retailers, so I may be waiting a while...click for more.

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