why track moved over thumb?

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ballspoint
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Speed: 20 mph off the hand
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why track moved over thumb?

Post by ballspoint »

A friend bowls thumbless, he made a slight change (unsure what) and hes now tracking over the thumb hole or just between thumb /fingers. He cant get it back so its not tracking ove the thumb. What causes this and any solutions please. cheers.
R/H, 20 mph off hand. 250 Revs.
11* Tilt. 70* Rotation. 5 5/8 x 1"up
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MegaMav
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Re: why track moved over thumb?

Post by MegaMav »

Stop grabbing it. Yes thumbless bowlers can grab it at the bottom.
Keep the hand still in the swing and finish with the thumb upward.
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