I agree wih flutedchamber about the powder. However, some tracers are designed to light up at different yardages. Some at 25-50 yards, some at over 100. During bright sunshine, it was rare that you could see the trace.
I have used the later, buying 1000. I found the accuracy was not great, but acceptable for shooting 100 yards and under. Accuracy varied wildly after 200 yards, because the tracers were lighting off weight at different yardages and at different rates (if they lighted at all).