Since I was a little kid I was told that tracers were FMJ rounds with phosphorous paint on the tip that burns as the round goes downrange. Am I right? Also, since my dad was in the national guard he said they loaded their mags every third round being a tracer. Am I right? Got into an argument with some idiot on youtube that says tracers are completely hollow and filled with a filling that burns and comes out a tiny hole in the bottom of the round as it goes downrange. He says that tracers are lighter because during night fire excercises some of them richocet off the ground and that tracers aren't loaded every third round. Of course, I looked at his youtube channel and it is full of nothing but video games. What a noob!