The "Air Combat Information Group" maintains a list of every air-to-air incident that US forces have been involved in in a number of conflicts. In Vietnam there were a fair number of gun shootdowns, although most were missiles.
Desert Storm had three gun shootdowns, with the rest being missiles.
1) What a COOL site!!! Thanks!
2) As you note, head to head has not happened for a LONG time.
3) I would love to meet “R. Greater” in person
Wow — just wow. The last guns battle in the list was an F-111 Raven — as I said in this (or maybe another) thread, always give pilots their guns. The Raven was a freaking surveillance craft and still pegged a bandit! (if I am reading the chart correctly) :)