A lot of balls have voids near the pins and psa's.
What you are seeing is the dust that settled into that void while drilling. I wouldn't worry about it much, but then again, I'd worry about your driller if he truly drilled the pin out!!
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Nick Smith ... A.K.A. Les Badderâ„¢
Brunswick -=- PBA 03-06
¡Viva la nación de Brunswick!