I’ve done some research. Some say it’s ok to use magnum primers, others don’t. So here’s the deal, I have some IMR 4064 and large rifle magnum primers. My 30-06 loads are primarily for deer hunting. So my question is, has anyone else pushed a 150-168 grain pill out of a 30-06 while using IMR 4064 / magnum primer with out accuracy or performance issues?