I've had a first realy good experince with a P38 the other day. I began a sortie in a 38 like always, little more alt then the cons, so on. I get a spixteen and to find only, I've wasted half my bullets. the next 5 kills seem to be realy short burst, and awsome snapshots. I finally look down to see that I still have 50 cannon rounds left! I decided that because of the increasing cons that I'll rtb.
The fact is, the guns are some of the best guns in the game, next to somthing like a Mossie or a Chog.