Columbia 300 Jinx 4.5 inch Pin. I stacked my Jinx, pin and CG is about 1 inch of my Center of Grip. ( Right Hander ). This ball is for medium to dry lane conditions. it has great length and nice flip on the back. The flip is strong and controllable allowing you to read the breakpoint on medium to dry lane conditions. This ball does not like oil it squirts a little long on oil, and its a little harder to get a read on it. If you need a medium to dry lane ball this jinx or the HyJinx is the ball for you.
I will review the Hyjinx after I throw it this evening.
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Darnell Bell
Eastern Columbia 300 Amatuer Staff