Had a lot of military training (but was never actually in the military)...fired and saw many different tracers from various platforms, and these look fine to me

And based on some of the real WW2 gun cam footage I've seen I think the team have done a great job!
If I was going to be pernickety (which I will

), then:
a) I remember red tracer to be slightly front heavy, trailing off towards the rear of the streak...when viewing from the rear that is...
b) tracers were a lot brighter, even in day time...actually looked like fire and had the same brightness...but I don't think any game can represent that on a screen.
Then again, I don't have any experience viewing tracers at 2000ft, flying at 300mph+, so will assume that Oleg and team know better than I do.

Besides, when I'm firing all cannons/guns, I won't be judging the realism of the tracer, I'll desperately be trying to keep my sights on the target and hold the right angle and speed.