Re: 300 rum and primers
I haven't messed around with the standard 215's, but i have tried 215M's in some loads and have found them to be too hot and soft and have gone back to using cci 250 primers in my 300RUM. For some reason, in all of my loads I was working up, the 215M's were always running hotter than loads with the cci's. Even with minimum charges and backed off seating depths. Like everyone says, no two guns are equal, so stick with what works and go with that. It's just the price we pay to experiment and play!