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The tracer effect could be burning lubricant or the wad, if you use one.
A friend of mine made wads out of carpet felt for his single shot .44" pistol. They were well greased and when he fired the gun the rear of the wad ignited and left a smoke trail to the target. It was quite impressive. Because he had used so much soft grease the wad stuck to the ball.
When i have watched someone through a spotting scope shooting a .577" at 100 yards you can see the bullet drop into the target, or should I say curl into the target as it is rotating from the rifling.