Winchester Repeating Arms Xpert 22, Bolt Action Rifle, 17 Winchester Super Magnum, 18 Barrel, Matte Finish, Black, Gray Stock, 8 Rounds, 1 Magazine 525200186 The Xpert from Winchester Repeating Arms combines accuracy, dependability and style in a lightweight bolt-action package. Now chambered in lightning fast 17 WSM, the Xpert features a precision Rimfire M.O.A. Trigger, button-rifled barrel with Bentz-style chamber and lightweight polymer stock.