Looking for information in regard to using standard (CCI # 400) vs. magnum (CCI # 450) small rifle primers for Lapua 6.5 x 47MM. Please feel free to weigh in on .223 also. Someone said magnum primers work well for .223 and I don't know how much to trust that info. I'm sure it has been addressed, but I'm having difficulty finding data on how much this will affect load pressure. Pretty new at reloading for rifle and appreciate all of the expertise that's available through LRH. Thank you.