Hornady is coming out with new 'Powder through dies" for their case activated powder drop linkage. So you will be able to expand and powder drop with a drum type measure. Hopefully they will also fit into a Uniflow linkage; if not, you can just buy a Hornady linkage for a Uniflow , or any other 7/8" threaded powder measure.
http://www.hornady.com/story.php?s=215
http://www.hornady.com/story.php?s=215
