I just got off the phone with technical assistance people at Dillon. I had a problem with my 650 in that a lot of the primers were trying to go in sideways and the arm that advances the primer wheel would not always go back to the point where it could engage in the hole to advance the primer wheel. He is sending me a new arm and spring for the primer assembly. But he also asked me what kind of primers I am using and when I told him Federals he adamantly told me not to use them in my 650 as they were too sensitive. Has anyone had a problem using Federals in there 650? I still have a case of 5000 left and would like to use them up, besides they work well in my Uberti Gunfighters.