Quote:
Originally Posted by CWMV
.50 cal tracer is red/red-orange depending on the person looking at it. This is true of ball, API, SLAP and I believe SLAP-T ammo.
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Historically, the incendiary material used for tracers could vary, giving them different colors - white, red/reddish-orange or green. Details here:
http://en.wikipedia.org/wiki/Tracer_ammunition