This is the way I do it.I had all kinds of problems like this only with large pistol primers. It was for a fairly short period of time. Short because I called Dillon out of frustration. Dillon said:
1. Winchester, Federal, or Rem primers only (softer cups);
2. do not push the ram bell crank handle. Push softly until you feel the case make contact with the primer. Then give it a little jab. It works! Found out I can even use CCI primers after I got used to it.