Here's a quick tutorial on how to easily and cheaply create ammunition for your guns.
For this I use a piece of sprue,
cut off a 1.5cm long piece,
and mounted it in my drill.
Then I started to save it into shape - first on a rasp,
then some 240 sandpaper,
and finally 400 sandpaper.
Within a few minutes I had a nice stack of ammo.
This also works for larger calibers.
Quick and cheap :)
I hope this is useful to you.