- Feb 25, 2008
Nope, makes zero difference to me the amount or type of powder.Is there a certain amount of powder before you would use a magnum primer? Or is it a combination of a certain amount of powder and the type of powder i.e. ball versus stick? I’ve been reloading for 30+ years but just now starting to get into the science of it and long range shooting over the last 10 years. I am contemplating using magnum primer in my 280AI & 30-06AI
Have had a load with a standard primer perform well but the same lot of testing performed better with a magnum primer.
I also run brass with both small and large primers, so they get tested with both types of primers and the tightest group wins.
Learnt long ago that a magnum primer can not only tighten groups, but also lower ES.
Have also had a standard primer like a BR-2 lower ES in a magnum cartridge.
If you don’t test, you’ll never know.
I often here people saying that they ONLY use benchrest primers because they are the only primers that are consistent.
I found over the pressure trace that WLR primers are the most consistent in start pressure because they are HOT primers and the WLRM are hotter than Fed215’s.
Rem primers, all of them, are COLD.