I recently purchased a new CVA Accura V2 M.L. rifle (Long Range model). I will use Black Horn 209 powder and I am wondering if I should use an 0 ring on the hot CCI 209 primer that I will be using. Do most new CVA models require the 0 ring? How important is placing an 0 ring on the primer to the overall accuracy of this muzzle loader? Would appreciate your experience with this matter. Cow Tag