You need to loose the cushion wads. Even pure lead wont slug up to the bore with that many cushion wads. Are your cases originally Berdan primed or Boxer primed. If the priming is Berdan primed than you will have address this before using. You can order brass cases made for your gun from Rocky Mountain cartridge Co. If your cases are 2 5/8" or 2 3/4" you can order some from Track of the wolf for about 7.00 each. That will solve your primer problem.