Chris Barnes had a great piece of advice in an interview I heard. They asked why he adjust so quickly. He said he would rather adjust and leave a spare that you can pick up rather than wait and throw a game breaking split.
On ten pin leaves you have a few options. A: keep your usual target and move your feet right one board. B: Move your feet back on the approach a couple of inches, no more than half a step.
Your scoring shows me that you are starting a board or two too far left with your feet. As the lane dries your ball/target are more in sync with the lane. Then it dries up but being a typical stubborn male, you wait too long to move. Learn to watch the ball from the arrows through the pins. If you miss the pocket but the ball looked good to the break point, move your feet in the direction of the miss (hit the 3, move feet right). If you start leaving the 4 or 6 pin make a 2 & 1 adjustment. That means feet two boards, target 1 or multiple there of (10 & 5 for example). If the ball hits the pocket, drives through the 5 and takes out the 8 leaving the 9 then the ball is too strong for that line. Consequently if it hits the pocket, hits the 5 and then the 9 leaving the 8, it's too weak for that line.
As for practice, I'm a firm believer in a purposeful practice. I have a plan going in and that's what I will work on for at least the first few hours. My normal practice has me starting way right each roll and moving left with each roll. Once I cross the lane I do it again with another ball. I will do this with whatever balls I have with me using the strongest first to the weakest. Then I spend at least one game just shooting corner pins, usually the ten first then the seven.
USBC SILVER CERTIFIED COACH
Gold Coach Candidate
Owner/Operator of Bowlerz Score Coaching
Tweener Rev Rate of 420, Speed 19 mph
Key Bowling Staff Member
Key Bowling Coaching Staff
IBPSIA member
Former Staff Bowler at www.BowlerX.com
Revs allow the ball to skid further, creating more push. This stores more energy for the hook and roll phases. I can play far outside and have over 400 revs. It goes long and breaks hard with drilled that way.
USBC SILVER CERTIFIED COACH
Gold Coach Candidate
Owner/Operator of Bowlerz Score Coaching
Tweener Rev Rate of 420, Speed 19 mph
Key Bowling Staff Member
Key Bowling Coaching Staff
IBPSIA member
Former Staff Bowler at www.BowlerX.com
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