I've been really curious about the difference between ball powders and extruded powders. I've always used ball powder because to me it seemed like it would give a more uniform burn and be better packed in the bullet. But so many people reload with IMR powders (mostly extruded) and other extruded powders. I was wandering if the way the powder packs in the bullet actually makes a difference. It also seems that some of the hottest loads in reloading books are with powders like IMR 4035 or something like that, which is an extruded powder