AFAIK, the typhoons used the 60 lbs rockets. The 25 lbs solid heads were used by Beaus and Mossies against ships. This is AP munition that according to the AH bomb AP rules should have a higher destructive power in a much smaller area than GP munition.
I would not mind getting the 25 lbs rockets for our Moss VI, especislly with the 1945 quad-rockets tree racks instead of the horrible rails we have now for the 60 lbs.