To 7x64 you can use starting loads for 280Rem for 7x64, take a look at my .280Rem webpage for loads.
Click at "Fabriksladdningar 1" or/and "Fabriksladdningar 2" factoryloads from bullets / powder manufactoryes.
But the C.O.L are not useful for 7x64, you have to do your own messure for the specific rifle.