YG- Eelde is right in that they do make cleaning a barrel much more important and much harder if lots of tracers rounds are fired between cleanings. I have never known of a tracer round to be the cause of burning up a barrel but don't try to shoot 1,000 rounds in a minute or two either.

MD- Hog is right. The will start a fire if the land in something dry enough quicker than you can say 'oh sh**!' I say about 6 dozen fires started from tracers during my tenure in the military.

Jerry