I was looking around on a WWII militaria site a while ago and bumped into this interesting piece of "trench art," as it is called. It features .30-06 rounds, along with several other types of ordinance. I thought you might like taking a look at it:
http://www.youtube.com/watch?v=rVi5_pcNhkk
http://www.youtube.com/watch?v=rVi5_pcNhkk