Have any one used magnum primers in the 9mm? I have worked up a load with magnum primers in 40 S&W. This load is with AA#5 powder and runs about 50fps more than standard primers, per my chronograph. I drop the same powder weight for both loads. I know that I will have to start low and work up the loads. I did this with the 40 S&W and when I got to my standard primer powder drop weight it was about 50 fps more. Not bad, nice to keep the Dillon powder drops setting at one weight no matter the primer. I don't run my loads hot, I run them on the lower end. So I am looking for some insight on using magnum primers in the 9mm.