While 6.5 Creedmoor is all the rage in the OEM world, quite a few in the reloading world have been looking at .260 Remington and its slightly hotter, smaller cousin, the 6mm Creedmoor for their precision long-range builds. Like the 6.5, the 6mm Creedmoor eeks out just a hair more case capacity (though some would argue this depending on the brass manufacturer).
6mm Creedmoor is pending SAAMI publication, but quite a few are looking to the caliber for their PRS and 1000+ yard guns while keeping to short-action lengths. Looking to it in a similar, albeit more scientific vein, RifleShooter.com purchased a 31″ blank and proceeded to test the caliber inch by inch.
The results? Its a barrel-burning caliber, but produces 3000+ FPS out of barrels 20″+ repeatedly. Considering 6mm’s ballistic coefficient, its a fantastically fast round capable of reaching out and touching targets. Putting pure speed aside for a second, Rifleshooter also looked to interpret the data.
In short, it seems that 25″ is the point of diminishing return for the caliber. Past that barrel length, gains in velocity drop relative to the barrel length.
For the full article, head on over to RifleShooter.com. The data, including details on the barrel, loads tested (all factory) and full results are live and ready for the long-range aficionado’s consumption.