Bowling ball random when impacting a full rack of pins on the first delivery of a frame, and sometimes when hitting downed "dead wood" pins on subsequent deliveries—the candlepin bowling sport is the only major one that allows fallen pins, provided no part of any fallen pin extends more than 24 inches (61 cm) forward of the head-pin spot, to remain on the lane's pindeck to be used in knocking down more pins with the next ball delivery in the same round—up to three balls are delivered, much as in duckpins, in each round of candlepins for one bowler. Bowling ball A
Ten-pin bowling use. With the two-handed release, the dominant hand's middle and ring fingers are inserted into the ball and the non-dominant hand (left for right handers, right for left handers) is kept on top of the ball and helps to support the ball until release. Examples of success with these styles include no-thumber Eric Copping, who has bowled over one hundred perfect games and holds the Vermont state record for average in a season with 246, and two-handed PBA members Jason Belmonte, Osku Palermaa and Jesper Svensson. There is an optimal bowling ball speed at which the player maximizes the chance