Got a c-system last week and it was drilled 4 X 4. Not sure what that is or means or what it's supposed to do. My specs are 18mph initial / 265rpms ,
PAP is 4 5/8 over 1 1/8 up, axis tilt 17° . Reason I ask is that this ball is completely differant than the other Brunswick stuff I have thrown.
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Bowling is like life. Sometimes you are the ball. Other times you are the pins.