With your loads of 48+ grains with the H414 was the case visibly full? Working up safely aside(acknowledged), are there any implications to "compressing" the powder through seating the bullet assuming no other danger signs are present?
I do not have years of reloading experience so this issue caught me by suprise and sparked my curiosity as I have never seen it addressed and have always been able to hear the powder shake in the cartridge.
