Ten-pin bowling regulations, identification letters and numbers, and general wear from normal use. For much of the history of bowling, bowling balls were made using a three-piece construction method. Starting in the mid-1990s, however, most manufacturers switched to a two-piece method. In response to these innovative ball designs, the American Bowling Congress placed further restrictions on the technical characteristics of the ball such as the radius of gyration and hooking potential. A game of bowling consists of ten frames. In each frame, the bowler will have two chances to knock down as many pins as possible with their bowling ball. In games
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