How do I get more powders to use as comparisons in the bottom left box "Selected Powders"? This list seems to have a lot of European powders I've never heard of and is also missing quite a few "mainstream" powders (e.g., IMR 4064, 4320)....

When you click on the seventh button from the right at the top, you'll get a couple of expandable bars to enable you to expand the range of quicknesses. Lowering the minimum loading ratio (lower right in that window) will also expand the range of powders that'll be listed as your options. (I set my minimum case fill at 90%, so I get a short list of the best powders. My maximum case fill is 100% � not compressed, IOW.)

The farther you have to go down the list, the farther from optimum those powders are. I set my maximum pressure at 50,000 lb/sq in. and maximum case fill at 100%. I don't like compressed loads, and I don't like a lot of air space � which means too many different ways that the powder can occupy the case � which can mean very inconsistent ignition.