I think I threw the ball about 5 times after having it drilled.  It was 16.0 lbs before drilling.  I had moved to 14lbs and got it drilled for nostalgia as my dad had received it from a Storm rep back in the day.  This (the drilling) was 10 years ago.  I put it in the box and didn't take it out until I recently redid my arsenal.  It's basically box fresh.  No dings, not even much of a track (pun) on the ball.