I am in the process of loading for my 223 Savage bolt. I have been loading for rofles and handguns for a couple of years now, just not 223 yet. The powders I am going to use are BL-C(2) H335 and H4895. ( saving my Varget and RL15 for my 308) I have CCI 400 primers and see that the 2 ball powders show using a mag primer. What gives if I use a regular sr primer?