I cant seem to get Winchester primers localy but am able to get CCI # 500 primers. I had read somehwere (Speer Manual I think) that the CCI primers are slighty larger than other brands..I am going to reload 9mm in Winchester brass, will the CCI primers be an issue on my not yet delivered 550b or should I eat the Hazmat fee to order the Winchester primers online..?? Can a Winchester brass loader shed some light for me please..??