CREATE TABLE table_17500 (".308 Winchester cartridge type" TEXT, "100 m group  ( mm ) " TEXT, "100 m group  (  MOA  ) " TEXT, "300 m group  ( mm ) " TEXT, "300 m group  (  MOA  ) " TEXT)

For which .308 winchester cartridge type is the 300 m group ( moa ) 0.51
SELECT ".308 Winchester cartridge type" FROM table_17500 WHERE "300 m group ( MOA )" = '0.51'
SELECT ".308 Winchester cartridge type" FROM "table_17500" WHERE "300 m group ( MOA )" = '0.51'