Why do snipers use .308 instead of 30-06?

AbbyBank 10 AMERICAN EXPRESS National Association National Bank 23 Brazos National Bank 2 Deutsche Bank National Trust Company 6 Feliciana Bank & Trust 1 First Security Bank, Canby 3 First State Bank of Michigan 2 FIRST WESTERN Bank 6 Forest Park National Bank & Trust 5 FREMONT Bank 12 Geo. D. Warthen Bank 13 GREAT SOUTHERN Bank 10 MACON B&TC 19 NORTH SALEM State Bank 12 OLD PLANK TrustAIL Community Bank National Association 8 Peoples Bank of East Tennessee 7 Port Austin State Bank 9 TRIAD Bank 16 Triumph State Bank 9 WOOD & HUSTON Bank 9