Litz just posted on his FB page that the Army is replacing it's gas operated M110's in 308 with the 6.5C and the 140 Berger. According to Litz hit percentages for the creed versus 308 with 175 smk at 600 is 93% versus 80% and 63% and 40% at 800.
Don't fret, the Mk 48 is also moving towards 6.5 CM instead of 308 also.Seeing what drones are doing to create the near trench warfare, the 6.5 vs 308 for a sniper rifle seems like arguing over what horse is best for the calvary after the machine gun....