I have someone that wants to sell some MG CMJ 124 Gr 9mm pretty cheap. I have never loaded any CMJ but assume that I can use my favorite 124 Gr FMJ load safely. Am I correct in assuming that I would reload just the same as if they were FMJ? What is the difference between CMJ and FMJ? I think that I read somewhere a while back that the base is different. Is the base fully encapsulated? What, if any, are the advantages of CMJ compared to FMJ?