khamul is correct, there is very little difference in where you place the core in a symmetric ball. It is called symmetric for a reason! If you turn the core 300 degrees to the right, it will look almost identical (i say almost because to make a pin out the core must be off at least 1/64 of an inch) to a core that is 30 degrees to the right! Guys, all you have to do is visualize it. There is absolutely no reason to drill a symmetric ball 315, it will not make a noticeable difference to anyone!
Louie, i had the same reaction at first when i drilled a freak out like that. I took the surface down to 600 on the ball and it became a great control ball for medium conditions. Lots of length with no backend should be expected from the 315, especially on strong mb cores. This ball will not be good on a house shot, however, it will bail you out when you throw on a tougher shot!
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stanski