ARperson, take a bore brush and some alcohol and clean the primer magazines. If Winchester primers are hanging you may need to get another magazine if cleaning does not take care of it.
I have had trouble with CCI primers. I have measured them and found that the cups were varying by .007"!!!!! CCI primers make my 550 a miserable nightmare. They stick in the pickup tubes, stick in the magazine, seat inconsistently, and just SUCK!!!!! Federal and Winchester make it run like a Rolex...