Frankly, these lasers...

I think the tracers both look real and not real at the same time.
A tracer used in aircraft has way more smoke trail from the phos on the bullet base (more phos to get a longer burn i would imagine)
So on screens the clean line without smoke trail emitting from the line isnt strictly right in my opinion, but the tracer itself is.
I think someone mentioned they look too clean, well the tracer itself should be clean, its the smoke trail from it that should twist and snake, and that smoke trail should be there for as long as the tracer is burning.