Tracers Rounds (From SimHQ)

[ChrisDNT]

"My observation was that to the human eye, the tracer looked like a short, thin streak of yellow/white light when it was near the gun (and the gunner's viewpoint as a result). However, it moved away so fast that it took less than a second for it to become a small bright dot, just like in the 110 picture."

Exactly, perfectly described.