I had mine drilled with the pin below my ring finger and the mass bias to the right and below my thumb (rt. handed). I guess it would be about at 10:30 on the clock face. It rolls very smooth and has a steady arc most of the way down the lane with a good strong finish at the pins. I don't have a lot of games on it yet and haven't bowled on a flood with it, but I absolutely loved it my first week with it in league. Will be throwing it again tonight looking for my first 800, that's how much confidence I have in this ball!