pate,
Thanks for the answer but your way off base with something you said and it's my fault. Those specs I gave are beginning numbers before the ball is drilled. I know a ball can't have that much weight after it's drilled.
chitown,
I drill most of my balls label leveraged, anything else is drilled for length on drier conditions. I've found that label is best for me because of my slower ball speed. I stick to symmetric cores. I bowl mainly on medium to medium oily conditions.