In general do you want to use fast powders with heavy bullets or light bullets? I'm loading 9mm 124gr, 40 155gr, and 45 200gr. Unique is filling cases past half so volume is more than W231, but slower burning. I have titegroup which is fastest of the three but have yet to try any loads which also takes less volume in case. If I understand what I've read rate of burn fastest to slowest of the three powders I have is titegroup, w231, and then unique. What's your opinions? Thanks for the help.