The German 7.9mm S.m.K. L’Spur (grünrote) loading is a pretty well known, dual-color AP/tracer. It traced green for approximately 500 meters then to red for the remainder of the trace. Not so widely known is that the Czech Vz. 28 tracer also had a dual-color trace. It traced white, then to red at mid-range of the 1000 meter trace.
Is anyone aware of any other 7.9x57mm tracers that had a dual-color trace?