I have revamped my web article Assault Rifles and their Ammunition: History and Prospects to include more detail about early developments and bring the present situation up to date. URL is http://www.quarry.nildram.co.uk/Assault.htm
Here's a pic from it showing current and possible future rifle/MG ammunition.
Tony Williams: Military gun and ammunition website: http://www.quarry.nildram.co.uk
and discussion forum: http://forums.delphiforums.com/autogun/messages/
