Depth Charge will definitely NOT fit in the med-light oil ball with 15mph. Not even with 17-18mph unless you drill it relatively weaker and tweak the surface.
It can handle medium to heavier mediums. It will, probably complement your XXX with similar oil handling capability, but different look.
You need to get it drilled weaker and adjust the surface if you still want to use it for med-light conditions..
I had two of them and drilled many for different styles. Trust me, it is relatively a strong ball.
Burak