I have a long pin from Steve and drilled it 5x5 with the pin about 2 inches above the middle of my fingers and the cg in my palm. Got it for medium oil on my ths last year and out of box went 236-268-236 or a 900 no tap. The ball is stronger than one would think. I kept it out of box and now cant use it since they changed the shot and took some oil away.
Cant compare to the urethane. This was my first AMF ball in a lonnnnnggg time. Good ball......