I've worked up a accurate and safe load in 400 corbon using accurate arms data. Using formed 45super brass and #9 with cci 350 primers. I want to use this load in starline 400 corbon brass with fiocchi small rifle primers. I've read where #9 needs a mag primer for a complete burn, but how should this standard small rifle primer effect pressure compared to the 350 primers? I do realize 400corbon brass(45auto+p) has a little less case capacity than standard 45 brass.