The Track Mx05 is the third installment in Track’s “M” series of balls designed for medium rev rate bowlers. It is also the third ball since the start of the new naming system that uses the Modified Kinetic weight block. This ball’s polished pearl coverstock glides through the front of the lane, revs up strong in the midlane, and then makes a big move at the back part of the lane.

Cranker and Tweener had the best reaction on our fresh medium test pattern. The Mx05 offered good length, but it did not skid past the breakpoint. It revved up strong and made a powerful move through the pins. Stroker was farther right ...