quote: The Rg and Diff numbers for the 16 and 15 lb balls are different. The ball motions are not. The ball motion for both weights is long and angular. We show video at our seminars showing that there is about 0.5 board max difference between both weights. The Mass Bias is very close on the 16 lb and 15 lb balls. This contributes to making the ball motions very similar. The core shape is symmetrical but is High Mass Bias. In fact it is the highest Mass Bias ball ever mass produced. Symmetrical Mass Bias is a relatively new concept, and has significant advantages over conventional asymmetrical Mass Bias construction. All of these topics are covered in our seminars on The One. Hope this helps.--------------------Ronald HicklandBall Design Engineer Ebonite/Hammer
