I drilled mine 4x4 using the strongest drilling on Storm's drilling chart. I was a little leery drilling it this way since I had become a down & in player, because that's what the house dictated. I noticed all the guy's with huge averages (I'm 207)were swinging the ball and decided to give that a try again. I was thrilled with the results. Only one ten pin in three league games. Eight in a row, right out of the box. Plenty of skid, and a strong move to the pocket. This ball gave me several X's all by itself. Had a big 600 despite several mistakes on my part, didn't adjust fast enough, but the ball was fine when I finally made the right moves in the third game. If I don't shoot an honor score in the next two weeks, it won't be the ball's fault. Like I said, only one ten pin in three league games, well worth the price. Drill One.