I drilled up my 15 lb. Hammer New Deal in this fashion with the weight hole drilled in the mass bias. I had never drilled a ball up like this before and wanted to see what it would do. It is an early rolling, very strong hooking layout for the New Deal. In fact, I have had to polish it to keep it from "hooking out" and on the right side of the head pin.
I have another New Deal drilled with the pin above the ring and the weight hole on the PAP and the reaction is much different, more controllable and tame.
I believe this drilling, especially with mass bias marked balls is supposed to be a very aggressive drilling.
Scott