For all of you anal reloaders ot there (65% of the AR reloading forum) here is a couple of items that you might want to have. The first item explains VMD and how to uses it. Don't worry it is in everyday words and even I was able to do it. The 2nd is a page from the Lee site that lists the density of most powders. Some of the newer powders are not on list. Have fun.

http://www.castbullet.com/reload/vmd.htm

http://leeprecision.com/cgi-data/instruct/VMD.pdf