I've been throwing 16lbs since i was 14??? I've stuck with 16lbs when 99% of everyone in bowling uses 15lbs or less....
I personally think if I went to 15lbs i would over throw the ball, and wouldnt get the carry i get right now. Plus, i dont feel like replacing the 12 to 15 bowling balls I have right now......
I did notice years back when a few bowlers i knew switched to 15lbs, I noticed on heavier oil patterns, their carry was sometimes lacking....
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