The first thing to check is the insert size(if using inserts) too tight of a hole/insert can cause that. If it is open it up a little or you could pull the insert and buzz the hole out alittle and put it back (sometimes the drilled hole can be a little small and squeeze the insert down.) or replace it and go up a half size and if its A oval make sure its lined up with your finger right.
Also have the pitch checked to see if it matches your specs and or your other balls.
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