Use H335 loading data, minus 10% by weight.
This was a commercial surplus powder. Not a military surplus powder.
I used up 7 pounds of it and liked it a lot.
I found that their starting load was very close to what I was looking for.
I found it a much better powder in smaller cases and smaller diameters. It isn't ideally suited for the 308 Win but it will be satisfactory.
The 10% figure, is a bit off but close enough, on the safe side.
I found I usually had to add a bit to the start load for the best balance between velocity and accuracy.
Just one note, the suggested starting load for H335 is 43.0 grains for your bullet weight. W735 is faster by about 8%, depending on which batch you have. 10% is safe.
Funny thing though, the starting loads were always the most accurate for this powder.
It was fantastic powder in the 223 Rem and the 22-250