I think I killed 8 in a row and almost 9 but one of my victims died a second before my rocket finished him off. Several of my shots were behind the enemy but go easy on me because I was not warmed up yet.
It was my first game of the night.It is also a good video to watch for those who are not very good with the soldier. You can see how I "lead" my target and try to shoot where I expect him to be. It doesn't always work out. Also, shoot at the feet for maximum splash damage.
Anyway here is the file:
http://members.cox.net/ezcrash1/ez.dem
And as Carpe said:
BTW, an easier way to access the demos is to press Shift+F2 on the main menu of TF2 to bring up the Demo Menu. From here, you can select from a list the demo you want, jump to a certain point, and other such things.