A more relevant question would be has anyone bowling a 300 without making lane adjustments. Here's the pros "secret": learn to watch the ball exit the pin deck. The ball should exit directly between the eight pin and the nine pin. If you see the ball start going more towards the eight pin, you are very close to leaving a four pin, and it's time to adjust on your next shot. If you see your ball start exiting more towards the nine pin, you are very close to leaving a weak ten and it's time to adjust. If you can learn to do this, it will do more to improve your bowling than anything else you can learn.
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