In general, 6.5 mm (.264") bullets are known for their relatively-high sectional density and ballistic coefficients and see success in rifle competition. The 6.5mm Creedmoor was designed for target shooting at longer ranges and as such, couples a sensible case volume (3.40 ml) to bore area (34.66 mm2/0.3466 cm2) ratio with ample space for loading relatively-long slender projectiles providing good aerodynamic efficiency and external ballistic performance for the projectile diameter.
The 6.5 Creedmoor is the new daring of the precision cartridge world. Its high ballistic coefficient allows it to fly out past 1000 yards, without a significant drop in performance when compared to a large bore caliber.