[Naz]

history for the most part. I came across some descriptions of a squadron in the Pacific theater that saw their kill count go up after they switched from tracer ammo to no tracer ammo. And secondly there's a combination of guncams where you'd see the occasional tracer and not a stream of them like now, combine that with the fact that only the last 5 seconds on nearly all machine guns were an indication to a pilot that he was running out of ammo.

I guess I'm looking for something like that.